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
I'd love to kill two kirds with one stone.
我想一箭双雕。
I presume that this is your final answer.
我认为这就是你最后的答复。
Then he spoke slowly, but I could not understand him.
于是他说得慢了，可我还是听不懂。