This is a hard rule to follow.

这个规则看来很难遵守。

youdao

There is no hard and fast rule on how to deal with this type of emergency.

对于如何处理这种紧急情况，尚无严格规章。

youdao

There is no hard and fast rule on how to deal with this type of emergency.

对于如何处理这种紧急情况，尚无严格规章。

youdao