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Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
活瓣
valved — past participle of valve
先理解核心含义，再看它在真实句子里的用法。
活瓣；阀；装阀；用阀调节
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
活瓣；阀；装阀；用阀调节
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
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Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT.