Delta rays
[医] δ[射]线(α粒子在气体所产生的β线)
🧩 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;
n. 射线；[俚]日光浴；光线（ray的复数）
🗣️ 情景例句
The checkout counters are very busy.
收款台都很忙。
Everything has its time and that time must be watched.
任何事情都有好的时机，不要随意放过。
I checked our supply of that material you asked for.
我查过了库存中你要的那种材料。