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
Would you mind showing me your showroom?
您可以带我参观一下展室吗？
You look very serious about something.
你似乎有很严重的事。
When Harry put on his act of being mildly annoyed, the assistant promised to order some for him.
哈里装出不高兴的样子时，女售货员答应为他定货。