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
If I fail this exam I'll fail the course.
我要是考试没通过，这门课就没学分了。
If it is left too long, it begins to give off a bad smell.
假如把它放得太久了，它就会开始发臭。
CUSTOMS OFFICER: Your passports, please.
请出示们的护照。