X - ray astronomy has made impressive progress.

X 射线天文学已取得了引人注目的进展.

辞典例句

Contribute little to either ultra - violet astronomy or X - ray astronomy.

所以气球携带的仪器对紫外线天文学或 X 射线天文学的贡献是不大的.

互联网

X - ray astronomy has made impressive progress in China.

X 射线天文学在中国已取得了引人注目的发展.

互联网