Mechanical seal
[化] 机械密封; 端面密封
🧩 词语组成解析
seal
[sil]
n. 密封;印章;海豹;封条;
v. 密封;盖章;决定;封上（信封）;
🗣️ 情景例句
He has a strong will.
他意志坚强。
Remember thou art but a man.
记住：你只不过是个"人"而已。
At that time only the British government had the right to sell salt, which was taxed, so Gandhi encouraged the whole nation to make their own salt.
那时，只有英国政府有权出售盐，而且盐是要征税的。于是甘地鼓励所有的国民自己生产盐。