Centre of gravity
重心\\n[化] 重心
?? 牛津釋義
centre of gravity
point around which the weight of an object is evenly distributed 重心.
?? 詞語組成解析
centre
['sent?r]
n. 中心;（市鎮(zhèn)的）中心區(qū);中心點;中樞;
vt.& vi. 置于中央;集中;把…當作中心;（使）成為中心;
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
??? 情景例句
Dad, growing up means
爸爸， 長大了意味著
Bye!
再見啦！
Snakes did not acquire their poison for use against man but for use against prey such as rats and mice, and the effects on these of viperine poison is almost immediate.
因為蛇有毒液不是用來對付人的，而是對付它的獵物，諸如鼠類，毒液對這些獵物會立刻起作用。