C 螺丝钉a small metal thing with a sharp end, that you use for fixing things together

　remove〔tighten〕 a ～　拧下〔拧紧〕螺丝钉
　loose ～　松动的螺丝钉

　The handle of this door is kept by two screws.　这扇门的把手用两枚螺丝钉固定。
　I removed the last of the screws and took the back off the machine.　我旋下最后一颗螺丝钉，打开了机器的后盖。

1. vt. & vi.用螺丝拧紧　 fasten or tighten with a screw or screws
2. vt.使更有效率　 twist round; make tight; be tense or more efficient
3. vt.加压力于；压榨　 exert pressure on; force (out of)

　～ the lock　上锁
　～ the two pipes together　把这两根管子拧紧
　～ reluctantly　勉强转动
　～ sufficiently　充分地鼓舞
　～ universally　普遍压榨
　～ around　鬼混，浪荡
　～ down the lid　用螺丝拧紧盖子
　～ off　旋开
　～ on　拧上
　～ together　拧在一起
　～ up the back door　把后门钉死
　～ up courage　鼓起勇气
　～ up discipline　加强纪律
　～ up a door　将门钉死
　～ up a piece of paper into a ball　把一张纸揉成一团
　～ a bracket into a wall　用螺丝把托架钉在墙上
　～ the lid off the jar　把瓶盖拧开
　～ the lid on the jar　把瓶盖拧上
　～ more taxes out of the people　向人民榨取更多的税
　～ water out of a sponge　从海绵中挤出水来

　The two pieces screw together easily.　这两个部件很容易拧紧。
　Let's screw the two pipes together end to end.　咱们把这两根管子接起来拧紧。
　He is busy screwing the lock.　他正忙着上锁。
　He screwed the facts to suit his own purposes.　他歪曲事实使其符合自己的目的。

 ♣ screw down　(v.+adv.)
　用螺钉钉住　fasten sth down
　Squeaking floorboards should be screwed down.　踏上去咯咯作响的地板应用螺钉钉住。
 ♣ screw in　(v.+adv.)
　旋…进去　tighten sth in sth
　Make sure that the hook is fully screwed in.　看看钩子是否已完全旋进去了。
 ♣ screw on　(v.+prep.)
　在…上安…　fasten sth on sth
　Why don't we screw a handle on the door?　我们为什么不在门上安个把手呢?
　A lock was screwed on the drawer.　在抽屉上用螺丝拧上暗锁。
 ♣ screw out of　(v.+adv.+prep.)
　把…挤出来　turn sth out of sb/sth
　The child is screwing water out of a sponge.　小孩正把海绵中的水挤出来。
　They screwed the money out of her by threats.　他们靠威胁逼她把钱拿了出来。
 ♣ screw with　(v.+prep.)
　用…旋牢　tighten with sth
　The handle screws with these two screws.　用这两颗螺钉把手就可旋牢在上面了。

　［词源］中古英语screwe（螺钉，螺旋）