They work under sub-zero conditions.

他们在零下的条件下工作。

Water will freeze in sub-zero weather.

在零下的天气里，水会结冰。

The temperature has dropped to sub-zero today.

今天的温度已经降到了零下。

Be sure to wear warm clothes in sub-zero weather.

在零下天气里一定要穿暖和的衣服。

The lake froze over due to the sub-zero conditions.

由于零下的条件，湖面结冰了。

The temperature dropped to sub-zero levels last night.

昨晚温度降到了零下水平。

The sub-zero temperatures make it feel extremely cold.

零下的气温让人感觉非常寒冷。

The sub-zero temperatures made it difficult to start the car.

零下的温度使得汽车很难启动。

The expedition team faced sub-zero temperatures in the Arctic.

探险队在北极面临零下的温度。

We need to wear thick clothes because it is sub-zero outside.

我们需要穿厚衣服，因为外面是零下温度。