A ball bearing
滚珠轴承
🧩 词语组成解析
ball
[bɔl]
n. 球;棒球（投手投出的）坏球;拇指球;舞会;
vt. 做成球状，使成团块;（指男性）和（女性）交媾（美式英语）;
vi. 呈球形，成团块;[美国俚语、口语]狂欢作乐，消遣;尽情作乐，尽情地玩;
🗣️ 情景例句
He's teething.
他正在长牙齿。
I ought to go now.
我应该现在走。
When the fire had at last been put out, the forest authorities ordered several tons of a special type of grass-seed which would grow quickly.
在大火最后被扑灭后，森林管理当局订购了好几吨一种生长迅速的特殊类型的草籽。