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've got a terrible headache and I feel really sick today.
我头疼得厉害，今天觉得很恶心。
Come in and make yourself at home.
请进，别客气。
They had little difficulty in finding it,
他们没费多大事儿就找到了盘子。