bellwether

股市通常被视为经济走势的风向标。

The stock market is often considered a ___bellwether of economic trends.

这支瑞典流行乐队的专辑销量是判断哪种风格将主宰明年排行榜的可靠风向标。

The Swedish pop group's album sales are a reliable ___bellwether of which sounds will dominate next year's charts.

这家小剧团的演出表现是该市文化复兴的风向标。

The performance of this small theater company is a ___bellwether for the city's cultural revival.