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
Yeah, it's been a long time.
是啊，好久没见面了。
I can't seem to get to sleep.
我好象睡不着。
I'm sorry you feel that way.
你这么说，太令人遗憾了。