screw pitch

例句：

1. 1. The screw was too tight,so I had to loosen it abit.
   螺丝太紧了，所以我得稍微松开一点。
2. 2. Thescrew is the key toholding the object together.
   螺丝是连接物体的关键。
3. 3. The screw was toosmall for the hole, so I hadto buy a larger one.
   螺丝太小了，所以我得买一个更大的。