20秒记一个单词（第611个）screw

screw /skru?/ n. 螺丝钉；螺丝:

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例句/词组:

One of the screws is loose.

有一颗螺丝松了。

英语表明：

a thin pointed piece of metal like a nail with a raised spiral line (called a thread ) along it and a line or cross cut into its head. Screws are turned and pressed into wood, metal, etc. with a screwdriver in order to fasten two things together. 螺丝钉；螺丝: