sleeve意思是：套管。
英 [sli?v] 美 [sli?v]
n. 套管；袖子。
If it is necessary to have the joints under water, they must be bedded into a box or sleeve which absolutely prevents water from penetrating in.
如果有必要在水下接頭，就必須把它們安置於絕對不滲水的密封盒子或套管中。
A stranger plucked at my sleeve as I was leaving.
我剛要離去，壹個陌生人拽我的袖子。
近義詞：
cover 常用詞匯
英 ['k?v?(r)] 美 ['k?v?r]
n. 封面；蓋子；套子；表面。
v. 覆蓋；涉及；包含；掩護；給?保險。
The front cover of the novel has been torn off.
這本小說的封面已被撕掉。
I can't make the cover of the tin fit on.
我無法把這罐頭的蓋子蓋上。