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
Everybody help yourselves.
大家请便吧。
Didn't I tell you before?
我不是告诉过你吗？
They stretch out their legs like flying squirrels.
它们伸展四肢，就像飞行中的松鼠一样。