X-ray astronomy
X射线天文学[参较 x-ray]
🧩 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
It's mostly young people who take part.
参加活动的绝大多数是年青人。
I told him to come in and rest for a while.
我告诉他进来休息一下。
He said that there was now no village.
他说那村子已经没有了。