Both root and root cap are covered by a sheath - like structure called the coleorhiza.

根和根冠被一鞘 状 结构,即胚根鞘所覆盖.

辞典例句

Coleoptile A sheath like structure that protects the developing plumule in grasses.

用来保护发育的胚芽的鞘状的结构.

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A sheath like structure , such as the leaf of a grass that surrounds stem.

影响燕麦或其他草叶的一种枯萎病.

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