Delta-rays
[医] δ-[射]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
Good morning, sit down please.
早安，请坐。
Did you go swimming yesterday?
你昨天去游泳了吗？
On Saturday, Ann came home from school a little earlier.
星期六，安放学后提早了点回家。