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 and I will talk this over.
我俩商量商量。
That street is only two miles long.
那条街仅仅是2英里长的。
I will never forget it.
我会记着的。