/skru: ||; skru/verb1 [T] screw sth (on, down, etc) to fasten sth with a screw or screws 用螺丝钉钉住或固定（某物）: The bookcase is screwed to the wall. 这个书架是用螺丝钉固定在墙上的。The lid is screwed down so you can't remove it. 这盖子是用螺丝钉固定的，因此是摘不掉的。
2 [I,T] to fasten sth, or to be fastened, by turning 扭紧；拧紧: The legs screw into holes in the underside of the seat. 椅脚都旋入座位底部的孔里。Make sure that you screw the top of the jar on tightly. 务须把瓶盖拧紧。
3 screw sth (up) (into sth) to squeeze sth, especially a piece of paper, into a tight ball 把某物揉成一团（尤指一张纸）: He screwed the letter up into a ball and threw it away. 他把那封信揉成一团扔掉。
screw (sth) up(
slang 俚语) to make a mistake and cause sth to fail 犯错而使某事失败；搞砸:
You'd better not screw up this deal. 你最好别把这笔交易搞砸。 screw your eyes, face, etc up to change the expression on your face by nearly closing your eyes, in pain or because the light is strong （因强光或痛苦而）瞇眼，脸部扭曲