1、common

常见的;普遍的

His name was Hansen, a common name in Norway.

他的名字叫汉森，在挪威是一个常见的名字。

Oil pollution is the commonest cause of death for seabirds.

石油污染是造成海鸟死亡最常见的原因。

共有的;共同的

Moldavians and Romanians share a common language.

摩尔达维亚人和罗马尼亚人使用同一种语言。

Such behaviour is common to all young people.

这种行为在年轻人中司空见惯。

寻常的;普通的

Democracy might elevate the common man to a position of political superiority.

民主也许能提升普通人的政治地位，让他们产生优越感。

Common salt is made up of 40% sodium and 60% chloride.

食盐由40%的钠和60%的氯化物构成。

2、screw up

眯起(眼睛);扭曲(面部)

She had screwed up her eyes, as if she found the sunshine too bright.

她眯起了眼睛，好像是觉得阳光太刺眼。

Close your eyes and screw them up tight.

合上眼睛，闭紧。

把(纸)揉成一团

He would start writing to his family and would screw the letter up in frustration.

他会提笔给家人写信，却常常懊恼沮丧地又把信纸揉成一团。

He screwed up his first three efforts after only a line or two.

前 3 次他只写了一两行就把纸揉成了一团。

弄糟;搞乱;毁坏

You can't open the window because it screws up the air conditioning.

你不能打开窗户，那样空调就不起作用了。

Get out. Haven't you screwed things up enough already!

滚出去。事情给你搞得还不够糟啊！