tour the heavens ;
例句:
Also , we have undertaken some statistical researches of galaxy sample based on SDSS and 2 MASS databases.
以SDSS和2MASS巡天数据为基础,开展了大样本星系统计性质的研究.
We can see a satellite flying across the sky.
我们可以看到一颗卫星巡天飞过.
Hubble Space Telescope image of the GOODS survey.
哈勃太空望远镜的GOODS巡天照片.