也许一颗大质量的未被观测到的天体应该对“赛德娜”那令人迷惑的轨道负责。它的引力影响让“赛德娜”固定在遥远星空中的那个位置上。

Perhaps a massive unseen object is responsible for Sedna's mystifying orbit, its gravitational influence keeping Sedna fixed in that far-distant portion of space.

youdao

和这个计划不同，更多研究者的努力方向是使用轨道高度22300英里的地球同步卫星，它们和地球的位置相对固定，可以不间断地传送能源。

Moststudies have focused instead on geostationary satellites, those whoseorbit 22, 300 miles above the Earth keeps them over a single location, to which they would transmit a continuous flow of power.

youdao

太阳穿过一些固定的恒星在一条被称为黄道的轨道上运行，经过一年的时间才回到原来的位置。

The sun moves through the fixed stars on a path called the ecliptic, taking a year to return to its original position .

youdao