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
you're all going to have your tonsils out.
你们都要切除扁桃腺。
Yes, I'm watching Channel 5.
是的，我在看5频道。
How would you like to proceed with the negotiations?
你认为该怎样来进行这次谈判呢？