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
Make a right at the stop sign.
就在停车再开标志那里向右拐。
In time of peace prepare for war.
居安思危。
It looks as if she's gone away for a few days.
好象她要外出好几天了。