It's a very important explanation and much debated, that at a critical time in the battle, one technique would be that one side would give one great big shove.

它是一种很重要的解释，而且饱受争议，那就是在战局一个重要的时刻，有一项技术就是一方给对方致命一推。

We are meeting at a critical time.

我们是在关键的时刻召开会议。

His intervention comes at a critical time.

他的干预恰好处于关键时刻。

And this is a critical time for animal study.

而目前的动物研究也处于一个关键时刻。

We are at a critical time in out history.

我们正处在我们历史的关键时期。