A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.
肋骨，叶脉：肋骨或肋骨状部分，例如叶子的中脉或昆虫翼的较厚的前部线或边。
A rib or a riblike part, such as the midrib of a leaf or a thickened anterior vein or margin of an insect's wing.
肋骨，叶脉：肋骨或肋骨状部分，例如叶子的中脉或昆虫翼的较厚的前部线或边。
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