N-COUNT
先兆；征兆；風(fēng)向標(biāo)
If you describe something as a bellwether, you mean that it is an indication of the way a situation is changing.
例句
For decades the company was the bellwether of the British economy...
幾十年來(lái)，這家公司一直是英國(guó)經(jīng)濟(jì)的晴雨表。
IBM is considered the bellwether stock on Wall Street.
國(guó)際商用機(jī)器公司的股票行情被視為華爾街股市的風(fēng)向標(biāo)。