三十的英文：
thirty

参考例句：

A day is about one thirtieth of a month.
一天大约是一个月的三十分之一。

The old lady counted out thirty pence and gave it to the shop assistant.
老太婆一个个地数出三十便士给了售货员。

One second of arc movement is one thirtieth of a millimetre.
一弧秒的移动是一毫米的三十分之一。

The blue whale grows to over 30 meters long.
蓝鲸可以长到三十多米长。

We put thirty spokes together and call it a wheel; but it is the center hole that makes the wagon move.
"三十辐,共一毂,当其无,有车之用"

They'd had a close platonic relationship for more than thirty years.
他们之间的柏拉图式的亲密关系已有三十多年了.

She's thirty now.
她今年三十岁了。

I am thirty years old.
我三十岁了。

The postage was thirty cents.
邮费为三十美分。

" Rambo is not thirty yet, isn't he? "
兰博还不到三十,对吗?

thirty是什么意思：
n. 三十，三十个
adj. 三十的，三十个的

She's thirty now.
她今年三十岁了。

She has starred in some thirty films.
她主演过大约三十部影片。

She was coming at nineteen-thirty.
她会在十九点三十来。

It‘s nineteen-thirty now.
现在是十九点三十分。

The mountains rejoice in an average annual rainfall of thirty inches.
山区的年平均降雨量为30英寸。