| 单词 | ratio |
| 释义 | ratio (once / 653 pages) n A ratio is the relationship in quantity or degree between two things: “The ratio of men to women on the construction site was ten to one.” This means there were ten men present and one woman. Use the word ratio when you want to make a comparison between two things. A ratio basically expresses a proportion. Often used in mathematics, the word ratio has many real world uses as well. This word is useful for everything from making salad dressing (an oil-to-vinegar ratio of three to one) to selecting a school for a child (consider the student-to-teacher ratio when making your decision). WORD FAMILYratio: ratios USAGE EXAMPLESA wealth ratio is a measure of how effectively you’ve converted your lifetime income into wealth. Seattle Times(Jan 02, 2017) Brady finished the regular season with 28 touchdown passes and two interceptions, the best touchdown/interception ratio in NFL history. Washington Times(Jan 01, 2017) It posted those returns despite an expense ratio of 1.75 percent. Seattle Times(Dec 31, 2016) 1n the relation between things (or parts of things) with respect to their comparative quantity, magnitude, or degree Syn|Hyper proportion magnitude relation, quantitative relation a relation between magnitudes 2n the relative magnitudes of two quantities (usually expressed as a quotient) Hypo|Hyper gross margin, margin of profit, profit margin the ratio gross profits divided by net sales abundance(chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million abundance(physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present albedo, reflective powerthe ratio of reflected to incident light aspect ratiothe ratio of the width to the height of a tv picture average(sports) the ratio of successful performances to opportunities breadth index, cephalic index, cranial indexratio (in percent) of the maximum breadth to the maximum length of a skull efficiencythe ratio of the output to the input of any system facial indexthe ratio (in percent) of the maximum width to the maximum height of the face f number, focal ratio, speed, stop numberthe ratio of the focal length to the diameter of a (camera) lens system frequency, relative frequencythe ratio of the number of observations in a statistical category to the total number of observations haematocrit, hematocrit, packed cell volumethe ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit I.Q., IQ, intelligence quotienta measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100) load factor(aeronautics) the ratio of an external load to the weight of the aircraft (measured in g) loss ratiothe ratio of the annual claims paid by an insurance company to the premiums received Mach numberthe ratio of the speed of a moving body to the speed of sound magnificationthe ratio of the size of an image to the size of the object mechanical advantagethe ratio of the force exerted by a machine to the force applied to it fuel consumption rate, gas mileage, gasoline mileage, mileagethe ratio of the number of miles traveled to the number of gallons of gasoline burned betting odds, oddsthe ratio by which one better's wager is greater than that of another magnitude, order of magnitudea number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10 output-to-input ratiothe output power of a transducer divided by the input power prevalence(epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population P/E ratio, price-to-earnings ratio(stock market) the price of a stock divided by its earnings productivity(economics) the ratio of the quantity and quality of units produced to the labor per unit of time proportionalitya ratio of two quantities that is constant quotientthe ratio of two quantities to be divided index of refraction, refractive indexthe ratio of the velocity of light in a vacuum to that in a medium relative humiditythe ratio of the amount of water in the air at a give temperature to the maximum amount it could hold at that temperature; expressed as a percentage respiratory quotientthe ratio of the volume of carbon dioxide expired to the volume of oxygen consumed by an organism or cell in a given period of time factor of safety, safety factorthe ratio of the breaking stress of a structure to the estimated maximum stress in ordinary use S/N, signal-to-noise, signal-to-noise ratio, signal/noise, signal/noise ratiothe ratio of signal intensity to noise intensity stoichiometry(chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers) time constantthe ratio of the inductance of a circuit in henries to its resistance in ohms employee turnover, turnover, turnover ratethe ratio of the number of workers that had to be replaced in a given time period to the average number of workers loadingthe ratio of the gross weight of an airplane to some factor determining its lift eccentricity(geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis proportionthe quotient obtained when the magnitude of a part is divided by the magnitude of the whole commensurateness, correspondence, proportionatenessthe relation of corresponding in degree or size or amount batting average, hitting average(baseball) a measure of a batter's performance; the number of base hits divided by the number of official times at bat fielding average(baseball) a measure of a fielder's performance; the number of assists and putouts divided by the number of chances figure of merita numerical expression representing the efficiency of a given system, material, or procedure adult intelligencethe average IQ of the adults in a given population borderline intelligencethe minimal IQ required for someone to function normally and independently in the world (without some form of institutional assistance) power loadingthe ratio of the weight of an airplane to its engine power span loadingthe ratio of the weight of an airplane to its wingspan wing loadingthe ratio of the weight of an airplane to its wing area incidence, relative incidencethe relative frequency of occurrence of something magnitude relation, quantitative relation a relation between magnitudes |
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