点击下方单词,选择对的这个单词
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1. 先兆；征兆；风向标If you describe something as a bellwether, you mean that it is an indication of the way a situation is changing.
1. sheep that leads the herd often wearing a bell
2. someone who assumes leadership of a movement or activity
多通过句子记忆单词，而不是单独死记硬背。
