Piston speed
[機] 活塞速率
?? 詞語組成解析
piston
['p?st?n]
n. <機>活塞;
speed
[spid]
n. 速度;快速;昌盛;（汽車的）變速器，排擋;
vt.& vi. 急行，加速;
vi. 超速;加速;迅速前行;興隆;
vt. 加快…的速度;使成功，使繁榮;
??? 情景例句
Well, maybe she will, and maybe she won't.
嗯， 也許她會， 也許她不會。
I'm not big enough.
我還不夠大。
but we found that it traced its way through the trees.
沒想到它到樹林中繼續向前延伸。