X-ray background radiation
[化] X射线本底辐射
🧩 词语组成解析
ray
[rei]
n. （热或其他能量的）射线;光束，光线;微量;伞形花序柄;
vt. 放射;照射;（思想，希望等）闪现;发光;
🗣️ 情景例句
If you roughhouse with a cat, you're going to get scratched.
如果你喜欢和猫嬉戏，可能会被爪子抓伤。
Cindy's sister will be staying with her for a week.
辛迪的姐姐将要陪她一个星期。
By having to sleep in the open, he gets far closer to the world of nature than most of us ever do.
由于被迫在露天睡觉，他比我们中许多人都离大自然近得多。