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
If you want to go sightseeing, a ferry trip is usually pretty cheap.
如果你想观光，坐船通常是比较便宜的。
There is a skeleton in every house.
每座房子都有骨架。
This is one example of a part-time job leading to greater things.
这是兼职工作通向更大事业的一个例子。