今晚气温将降至零度以下，记得多穿点衣服。

Tonight's temperature will drop to ___sub-zero, so remember to dress warmly.

在零下温度中，水管很容易冻裂。

Pipes can easily burst in ___sub-zero temperatures.

在经济衰退期间，就业市场跌至冰点。

The job market reached ___sub-zero conditions during the economic downturn.