三十九的英文：
thirty nine

参考例句：

My temperature is thirty-nine degrees.
我的体温是三十九度。

A meter is equivalent to 39.37 inches.
一米相当于三十九点三七英寸。

The cohort of people aged 30 to 39.were more conservative&b{American Demographics)
年龄在三十到三十九的一群人…更加保守(美国人口统计数据)

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。

nine是什么意思：
num. 九，九个；第九
n. 九，九个
adj. 九的，九个的

It is nine now.
现在九点了。

A stitch in time save nine.
一针及时省九针。

Nine plus one is a decade.
9加1是10。

Nine is the square of three.
九是三的平方。

I have nine little goldfish.
我有九条小金鱼。