- 十，二十，三十，四十，五十，六十，七十，八十，九十，一百。
Ten, twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety, one hundred.
- 数到三十。
Count to thirty.
- 这个要三十欧元。
This will cost €30.
- 这班有三十五个学生。
This class is made up of thirty-five pupils.
- 这间班房只能容纳三十个学生。
This classroom can accommodate only thirty students.
- 博物馆入场费是三十美元。
Admission to the museum is thirty dollars.
- 我们结婚已经有三十年了。
It is thirty years since we married.
- 有些月份有三十天，有些月份有三十一天。
Some months have thirty days, others thirty one.
- 我在这里住了三十年了。
I have lived here for thirty years.
