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 see what you mean.
我明白你的意思。
Do you have any openings?
你们有空缺吗？
This decline in vigour with the passing of time is called ageing.
生命力随时间的流失而衰退叫做衰老。