It's actually been there all along, but astronomers have only now spotted what could be the seventh closest star system to the sun.
事实上它应该存在很久了，不过天文学家们一直只能观测到距离太阳第七近的恒星系统。
This is his seventh year in the NBA, and he just made his third trip to the circus that is the NBA All-Star Weekend. But this was his debut appearance on the main stage.
拉沙德·刘易斯在NBA已经是第七个年头了，但他只参加过三次全明星周末的活动，而本赛季是他第一次出现在全明星赛上，不过在此前他用行动证明了自己已经进入了明星的行列。
Swiss tennis star Martina Hingis was seventh on the news search list, ahead of autism, the US National Football League draft, and the television show Celebrity Big Brother.
瑞士网球名将玛蒂娜·辛吉斯名列第七位，其次是“孤独症”、NFL美式橄榄球联赛选秀和真人秀节目《名人老大哥》。
The other three bodies farther off from the star could feature smaller bodies of water and the seventh could even boast a puddle or two under ideal conditions.
另外三颗离恒星较远的行星表面覆盖的液态水可能较少，理想条件下第七颗行星甚至可能只有一两个水坑。
The other three bodies farther off from the star could feature smaller bodies of water and the seventh could even boast a puddle or two under ideal conditions.
别的三颗离恒星较远的行星概况笼盖的液态水可能较少，抱负前提下第七颗行星甚至可能只有一两个水坑。
The other three bodies farther off from the star could feature smaller bodies of water and the seventh could even boast a puddle or two under ideal conditions.
别的三颗离恒星较远的行星概况笼盖的液态水可能较少，抱负前提下第七颗行星甚至可能只有一两个水坑。
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