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
Hi. Michelle,
嗨， Michelle，
Missing school to watch the football match is out of the question.
为看足球赛而旷课，那可不行。
Then he remembered his comrade downstairs.
然后他想起楼下的同志。