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
What are you working on?
你在干什么？
Mr. Smith is still in his forties.
史密斯先生才四十几岁。
You're right. And there are some jobs that men can't do very ell.
你说得对。有些工作男人干得不怎么好。