mainstem

名词 n.
中文释义

英文释义

名词 n.
  1. The principal watercourse of a river that has multiple streams
    — Piramutaba (Brachyplatystoma vaillantii) make up a second large export fishery and are found almost exclusively in the Amazon River mainstem, whitewater tributaries, and the estuary [30 –32 ].

词形变化

mainstems plural

词源

From main + stem.
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