Retaining valve
[化] 单向阀
🧩 词语组成解析
n. 保留, 保持, 维持防护\\nv. 保持( retain的现在分词 ); 拦住; 保存; 止住
valve
[vælv]
n. 阀;真空管;（管乐器的）活栓;（心脏的）瓣膜;
vt. 装阀于;以活门调节;
🗣️ 情景例句
It isn't the way I hoped it would be.
这不是我所盼望的。
Which one is the longest river in China?
中国哪条河流最长？
Mary has written ten letters today.
马力今天写了十封信。