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valves是什么意思？

valves

相关单词 bivalvesrectifying valves
例句
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柯林斯高阶英汉双解学习词典释义
  • N-COUNT
    阀;活门
    A valve is a device attached to a pipe or a tube which controls the flow of air or liquid through the pipe or tube.
  • N-COUNT
    （心脏的）瓣，瓣膜
    A valve is a small piece of tissue in your heart or in a vein which controls the flow of blood and keeps it flowing in one direction only.
    例句
    He also has problems with a heart valve. 他的一个心瓣也有毛病。