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
so I wouldn't lose them.
免得我弄丢了。
Please call me before you come.
你来之前请打电话。
The undulating waves of the open sea are generated by three natural causes:
海浪是由三个自然因素形成的：