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
That's the worst part--making decisions.
最伤脑筋的是要作决定。
Please show me a large one.
请给我看一件大一点的衣服。
What about their cat?
那她们的猫呢？