But that's not a hard and fast rule.

但这并不是硬性规定。

youdao

This is not a hard and fast rule, it is simply what I recommend from experience.

这不是一个硬性的规则，它只是我所建议的经验。

youdao

Our factory has a hard and fast rule against smoking.

我们工厂严格规定不许吸烟。

youdao

Our factory has a hard and fast rule against smoking.

我们工厂严格规定不许吸烟。

youdao