主干

trunk stem的用法和样例:

例句

  1. The main stem of a tree is a tapering geometricsolid.树木的主干是一种有消度的几何体。
  2. The common trunk and lateral enous plexuses are coered and concealed by the prostatic and endopelic fascia.主干和侧支静脉丛被前列腺和盆内筋膜所覆盖。

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