Acid (-proof) valve
[化] 耐酸阀
🧩 词语组成解析
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
Use a dictionary and grammar guide constantly.
经常使用字典和语法指南。
How much does packing take up of the total cost of the goods?
包装占货物总成本的百分比是多少？
Sometimes a tame elephant is tethered nearby to give the wild one confidence,
有时，把一头已驯服的象拴在旁边能给野象以信心。