barometer

1. N-COUNT A barometer is an instrument that measures air pressure and shows when the weather is changing. 气压计

A man in camp took a barometer reading at half-hour intervals. 营地里的一个人每半小时看一次气压计。

2. N-COUNT If something is a barometer of a particular situation, it indicates how things are changing or how things are likely to develop. 发展变化的指示计

In past presidential elections, Missouri has been a barometer of the rest of the country. 在过去的总统大选中，密苏里州一直是该国其余各州的晴雨表。