I can represent my age with a number.

我可以用一个数字来表示我的年龄。

You might represent each letter with a number.

你可以用数字来表示每个字母。

Look for a bus with a number six on the front of it.

找一辆前面有六号的公共汽车。

Head each column with a number;

给每列前面加上数字；

The beakers were tagged with a number.

烧杯都标有数字.

Your Email Name cannot start with a number.

你的电子邮件名字不能以数字开始。

You can get in touch with a number of regrets.

你可能会有许多的后悔。

WHO, in collaboration with a number of partners

世卫组织与许多合作伙伴一道

The object itself provides us with a number of clues.

披肩本身给了我们一些线索。

Each animal was tagged with a number for identification.

每只小动物都系上了标有号码的小牌，以便确认。