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
I'm asking in the five thousand a month.
我要求月薪5000元。
I worked at the shipping company this morning.
我今早在船公司工作。
You are just in time.
你来得正是时候。