1、ordinary

平常的；普通的；一般的；平凡的

I strongly suspect that most ordinary people would agree with me.

我坚定地认为绝大部分老百姓会赞同我的观点。

It has 25 calories less than ordinary ice cream.

它所含热量比普通的冰激凌少了25卡路里。

平庸的；平淡无奇的

I'm just a very ordinary, boring normal guy.

我只是一个颇为平庸无趣的普通人。

Your life since then must have seemed very ordinary.

你的生活从那时起一定非常平淡无奇。

不寻常的；非凡的；特殊的

The boy's knowledge was out of the ordinary.

这个男孩懂得的知识非比寻常。

I've noticed nothing out of the ordinary.

我没注意到什么特别之处。

2、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。