We are at acritical time in history .

我们正处在历史的危急时刻。

The patient was in acritical condition .

病人处于风险的状况。

Comes at acritical juncturein global economic development .

全球经济发展的关键时机。

It could be acritical goal of this game .

这可能是本场角逐最关键的入球。

One can 't be too careful in making the decision as it is such acritical case .

这是一个如此重要的问题,所以在做决定是怎样谨慎都不过分。