| 单词 | mass-ratio |
| 释义 | > as lemmasmass-ratio mass-ratio n. the ratio of the masses of two things, esp. (in Aeronautics) of a rocket with its fuel tanks respectively full and empty. ΘΚΠ the world > relative properties > number > ratio or proportion > [noun] > of particular quantities mass-ratio1919 society > travel > air or space travel > a means of conveyance through the air > spacecraft > rocket > [noun] > in relation to payload > ratio of masses with or without fuel mass-ratio1919 1919 Philos. Rev. 28 58 It should be observed that in measurements of mass we are always determining mass-ratio. 1935 Proc. Royal Soc. A. 150 252 Any small error in the original determination of the He4–016 mass-ratio will give a cumulative error in all other masses. 1949 W. Ley Conquest of Space (1950) i. 26 The mass-ratio is 2·7:1—that is,..the rocket at take-off weighs 2·7 times as much as its empty hull, machinery and payload. 1989 New Scientist 24 June 68/2 The mass ratio is the ratio of the mass of the space vehicle (including payload) plus the mass of the propellent, divided by the mass of the vehicle without propellent. < as lemmas |
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