alternatively

We could go to the cinema; alternatively, we could stay home and watch a movie.

(Chinese) 我们可以去电影院；或者，我们也可以留在家里看电影。

You can pay the full amount now; alternatively, you may choose to pay in installments.

(Chinese) 您可以现在全额付款；或者，您也可以选择分期付款。