常見例句雙語例句Look at the billiard ball alone-- - forget the ping-pong ball-- and try to see that the speed of the billiard ball is practically unaffected by the collision.我們衹看臺球-,完全忽略乒乓球-,來看看臺球的速度,它實際未受碰撞影響。 返回 billiard-ball collision