thirty英 [θti] 美 [θrti] num.三十;三十几;三十年代复数 thirties
例句
The association between the two companies stretches back thirty years.
这两家公司的往来可以追溯到30年前。
I know that you\'ve been studying chimpanzees for thirty years now
我知道你研究黑猩猩至今已有30年了。
水利万物而不争,
而万物莫能与之争。
