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
Fine. How much would you like to exchange, sir?
好的。您要兑换多少呢，先生？
I'm studying upstairs.
我在楼上读书。
Do you think the method of payment is OK for you?
你们认为结算方式合适吗？