Keplerian
a. (德国天文学家)开普勒的,开普勒定律的,开普勒理论的
🗣️ 情景例句
That's a great idea, Grandpa!
这太好了， 爷爷。
The first step is the only difficulty.
万事起头难。
It makes it easier for us when we get the order on the dock.
这样我们在码头提货时比较方便。