thirty
n. 三十年代
num. 三十
adj. 三十个的
复数 thirties
例句
By sunset we had covered thirty miles.
到日落时我们已走了三十英里。
《牛津词典》
Some thirty people attended the funeral.
大约有三十人参加了葬礼。
Six goes into thirty five times.
6除30得5。
《柯林斯英汉双解大词典》
