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bellwether noun

  /ˈbɛlwɛðə/ , /ˈbɛlwɛðɚ/
  • (figuratively) Anything that indicates future trends.
 しるし, 兆し, 兆候, 前触れ
  • (finance, figuratively) A stock or bond that is widely believed to be an indicator of the overall market's condition.
 指標
  • The leading sheep of a flock, having a bell hung round its neck.
 鈴つき羊
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