at it 的中文翻译

干个不停

at it 的英文句子和中文句子

I knew if I kept at it I should succeed.

我知道如果我坚持下去就会成功。


The biologist stained the specimen before looking at it through the microscope.

那位生物学家先把标本染色, 然後再通过显微镜进行观察.