After takeoff, the four-person team is expected to travel into an oval- shaped orbit aboard the Crew Dragon spacecraft, high enough to plunge the vehicle and crew into the Van Allen radiation belts.

预计发射后，四人团队将乘坐龙飞船进入一个椭圆形轨道，轨道高度足以让飞船和宇航员进入范艾伦辐射带。

But in the early 1600s, the German astronomer Johannes Kepler presented the results of comprehensive observations which showed that the planets move in elliptical – or oval – orbits with the sun at one focus.

但在 1600 年代初期，德国天文学家约翰内斯·开普勒 (Johannes Kepler) 提出了综合观测的结果，该结果表明行星在椭圆形或椭圆形轨道上运行，太阳在一个焦点上。