hard and fast

This distinction isn't hard and fast.

这样的差别并非是一成不变的.

He did not hold with all these hard-and-fast restrictions.

他不赞成这些死板的限制.

Our factory has a hard and fast rule against smoking.

我们工厂严格规定不许吸烟.

We stuck hard and fast on the rocks in the middle of the river.

我们被阻滞在河当中的礁石上.

Push hard and fast.

用力快速挤压.

The teacher said that there was a hard-and-fast rule against smoking in school.

教师说学校有严格的禁止吸烟的规定.

It is impossible to lay down any hard and fast rules.

想要制定出任何不容更改的规则是不可能的.

Push hard and fast. Aim for a rate of about one hundred compressions each minute.

使劲迅速的按压, 以每分钟大约100的挤压速度为目标.

We must make it a hard and fast rule against smoking in the office.

我们必须严格规定:办公室里不准吸烟.

You can't lay down hard and fast rules.

规则不能定得太严太死.

There's no hard-and-fast rule.

并无定规.

No hard and fast line can be drawn between the two.

二者不能截然分开.

It is a hard and fast contract.

这是一项不能变动的契约.

You can not lay down hard and fast rules.

你不能制定严格的规则.

He stuck hard and fast to his principles.

他严守自己的信条.