“

　　I love the challenge of starting at zero every day and seeing how much I can accomplish.

　　我喜爱挑战每天从零开始，然后看自己可以完成多少。

　　”

　　orbit  noun

　　[ˈɔːrbɪt] 

　　the (usually elliptical) path described by one celestial body in its revolution about another

　　(天体等运行的)轨道；(人、组织等的)影响范围，势力范围

　　例句：

　　The orbit of this comet intersects the orbit of the Earth.

　　这颗彗星的轨道与地球的轨道交叉。