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
Hi.
嗨。
I'd like to have a seat by the window.
我要一个靠窗的座位。
It looks as if it hasn't been washed following the instructions.
这看起来没按说明来洗。