Stepless (variable)drive
[化] 無級變速傳動裝置
?? 詞語組成解析
[機] 無段式, 無段的
??? 情景例句
We were very young.
我們那時很年輕。
None of my business.
不關我的事。
Alternatively, if the star were small, the life-supporting planet would have to have a close orbit round it and also provide the perfect conditions for life forms to develop.
反之，如果恒星很小，維持生命的行星就要在離恒星很近的軌道上運行，而且要有極好的條件才能使生命得以發展，