The AF valve, which is recommended for freeze protection in extreme climates, is actuated by two conditions.

AF阀门被建议用于非常气候下的防冻保护，产品由两种电缆控制。

The fossil climates Dr Barnosky and Dr Hadly have been looking at are, even at their warmest, cooler than the more extreme predictions for the next 100 years.

而且巴诺斯基博士和哈德利博士所研究的化石所处气候再热，也比人们对未来100年更极端的预测要凉爽些。

Vinyl gutters can also become brittle in extreme hot and cold climates.

乙烯基水槽也能够成为在极端热脆性和寒气候。