smooth lining的意思|示意

美 / smu:ð ˈlaɪnɪŋ / 英 / smuð ˈlaɪnɪŋ /

平滑线；均匀分布参数线路

A normal heart has a smooth lining, making it difficult for bacteria to stick to it.

正常心脏有平滑的内膜, 使细菌很难在上面附着.

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