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
Dad was a busy doctor,
爸爸是个很忙的医生，
Would you mind handing me that cup?
请把那个杯子递给我，好吗？
We're going to pick apples.
我们打算去摘苹果。