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
to be a reporter--a newspaperman.
将来当一名记者 一个新闻从业人员。
Tom graduated from college at a very young age.
汤姆很年轻就从大学毕业了。
It was at Charlie's wedding. You were playing the piano.
那是在查理的婚礼上，你在弹钢琴。