Pressure retaining valve
[化] 保压阀
🧩 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
You will never guess.
你绝对猜不到。
He should see the doctor.
他应该去看医生。
Had he worked harder, he would have gotten though the exams.
如果他努力了的话，他就会通过考试的。