Ball cover
[化] 滚珠轴承盖
🧩 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
Why don't you call back later this afternoon?
你何不今天下午再来电话呢？
How many boxes are you going to use?
你要用几盒？
It's often cold in December, January and February.It snows sometimes.
12月、1月和2月常常很冷，有时还下雪。