1. 做为选择,也许：alternate 交替,轮流 | alternatively 做为选择,也许 | aluminiun 铝

2. 或者：absolutely imperative 绝对必要 | alternatively 或者 | substantially 基本上

3. 两者择一：alternative 二中择一 | alternatively 两者择一 | alternator 交流发电机

1. 要不然；或者
You use alternatively to introduce a suggestion or to mention something different to what has just been stated.

e.g. Allow about eight hours for the drive from Calais. Alternatively, you can fly to Brive.
从加来开车去，要留出大约8小时的时间。或者，你可以坐飞机前往布里夫。

adv

1. in place of, or as an alternative to

e.g. Felix became a herpetologist instead
alternatively we could buy a used car

Synonym: insteador else