Delta seal
[化] 三角密封
🧩 词语组成解析
delta
['deltə]
n. 希腊语字母表第四字母δ;（河流的）三角洲;[数]变量增量;
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
Did you see what Diane was eating? And she's on a diet.
你看戴安妮在吃什么吗？她在节食啊。
I don't mind staying up late.
我不在乎熬夜。
Eleven. And we play the game with a ball like this. Is the game popular in the USA?
11名。而且我们用这样的球比赛。这种比赛在美国受欢迎吗？