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
Good night.
晚安。
What do you want?
你到底想怎样？
However, size and strength are not the only important things about this bridge.
然而，这座桥重要特点不仅是它的规模与强度。