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
We tested it last week on twelve- to fifteen-year-olds,
我们上一周曾在十二岁至十五岁的孩子中试过这项游戏，
What do you recommend?
你推荐什么？
One of the thieves was struck by a heavy statue, but he was too busy helping himself to diamonds to notice any pain.
一个窃贼被一尊很重的雕像击中，但由于他忙着抢钻石首饰，竟连疼痛都顾不上了。