critical temperature range

That's a real critical issue--what is the range of temperature or climate conditions to which we can adapt, and when do we exceed those?

那是一个真正关键的问题——我们可以适应的温度或气候条件的范围是什么，我们什么时候会超过这些范围？

That's a real critical issue - what is the range of temperature or climate conditions to which we can adapt, and when do we exceed those?

这真是一个棘手的问题——我们能适应多大的温度和气候条件变化幅度，和什么时候我们会超越这个幅度。

Hardening. This is the process of heating to a temperature above the critical range, and cooling rapidly enough through the critical range to appreciably harden the steel.

淬火。这个工艺是把材料加热到临界温度范围之上，然后迅速冷却到临界温度范围以下，使钢材明显变硬。