| 单词 | acceleration |
| 释义 | acceleration (once / 2821 pages) n Acceleration is the act of increasing speed. When you buy a sports car, you want one that has great acceleration, so it can go from zero to 60 miles an hour in no time. Acceleration comes from the Latin word accelerationem, which means "a hastening." When you hasten, you hurry, so acceleration is a speeding-up. Maybe you are walking to an appointment and realize you will be late. You pick up your pace — that's acceleration. If the rain on a stormy day begins to come down faster, that too is acceleration. As you can see, acceleration isn't just for cars. WORD FAMILYacceleration: accelerations+/accelerate: accelerated, accelerates, accelerating, acceleration, accelerative, accelerator, acceleratory/accelerative: acceleratively/accelerator: accelerators USAGE EXAMPLESThe third quarter increase was a sharp acceleration from tepid annual growth of 0.8 percent in the first quarter and 1.4 percent in the second. Seattle Times(Dec 22, 2016) A few months ago, newspapers saw a sudden acceleration of losses in print advertising. Washington Post(Dec 18, 2016) It’s clear the minivan revolution didn’t include tire-smoking acceleration, as I learned when I pressed the loaner’s gas pedal to the floor. New York Times(Dec 15, 2016) 1n an increase in rate of change modern science caused an acceleration of cultural change Ant|Hypo|Hyper deceleration, retardation, slowing a decrease in rate of change getaway, pickup the attribute of being capable of rapid acceleration precipitationan unexpected acceleration or hastening alteration, change, modification an event that occurs when something passes from one state or phase to another 2n the act of accelerating; increasing the speed Syn|Ant|Hyper quickening, speedup deceleration the act of decelerating; decreasing the speed hurrying, speed, speeding changing location rapidly 3n (physics) a rate of increase of velocity Ant|Hypo|Hyper deceleration (physics) a rate of decrease in velocity angular acceleration (physics) the rate of change of the angular velocity of a rotating body centripetal accelerationthe acceleration toward the center that holds a satellite in elliptical orbit rate a magnitude or frequency relative to a time unit |
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