Stepwise seal
[化] 台阶式密封
🧩 词语组成解析
a. 楼梯式的, 逐步的
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
He was very hard driven.
他被迫拼命干活。
My brother wants to learn how to speak Chinese.
我的兄弟要去学中国话。
Thanks very much. I must go!
谢谢，我必须走了。