柯林斯英汉双解大词典
root cap
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1.
N a hollow cone of loosely arranged cells that covers the growing tip of a root and protects it during its passage through the soil 根冠
双语例句原声例句
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Root cap was the site of light perception.
感受光刺激的部位是根冠。
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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。
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The result is, high N-level can promote the root to grow, but the root cap ratio will comes down.
结果表明，较高的氮素水平促进根系生长，迅速提高水稻根干重， 但同时降低根冠比。
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