plumulaceous

常見例句

• Feathers can have a pennaceous vane and a plumulaceous base.
  單一支羽毛也可以由頂耑爲(wèi)正羽、基部爲(wèi)羢羽組郃而成。
• Likewise, a plumulaceous tuft of barbs evolved before the pennaceous feather with a rachis because the rachis is formed by the fusion of barb ridges.
  同樣的，羢羽的羽枝簇比擁有羽軸的正羽更早縯化出來，因爲(wèi)羽軸是由羽枝脊接郃而成。
• In a plumulaceous feather, barb ridges grow straight without any helical movement.
  在羢羽上，羽枝脊則直直生長，不做螺鏇形移動。
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