例句
Students have to reach a certain standard or they won’t pass.
学生必须达到某一标准，否则无法通过。
The airline has rigorous safety standards.
这家航空公司有严格的安全标准。
Students have to reach a certain standard or they won’t pass.
学生必须达到某一标准，否则无法通过。
The airline has rigorous safety standards.
这家航空公司有严格的安全标准。