mainstem
The principal watercourse of a river that has multiple streams
plural of snapweed
(politics, derogatory) The activists, academics, and organizations whom conservatives allege to be using race issues to acquire power or money.
(golf) A scoring system in the sport of golf that involves scoring points based on the number of strokes taken at each hole; (by extension) a game played according to this system.
保全活動家たちは、上流の支流からの数十年にわたる汚染の後、その川の本流の修復に力を注いだ。
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