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
Didn't you give them to Richard?
你不是把它们交给Richard了吗？
He is planning his future already.
他已经在为将来做打算了。
Only by working hard can we succeed in doing everything.
只有努力，才能成功