three:

n. 三，三个

num. 三

adj. 三的，三个的

The police questioned three suspicious people.

**查问了三个可疑的人。

The final answer to this question is three.

这道题的最终答案是3。

triple:

adj.三倍的，三方的，三部分的

vt.& vi.（使）增至三倍

n.三倍的数[量]；三个一组；[棒]三垒安打

He received triple pay for his extra work.

他因超额工作得到三倍的报酬。

In the past five years the company has tripled its sales.

过去五年中，该公司销售量增至三倍。

His income tripled in three years.

三年中，他的收入增至三倍。

Twelve is the triple of four.

十二是四的三倍数。