The monarch butterfly's population in the last few years.

帝王蝶的数量在过去几年中。

My life has changed a lot in the last few years.

我的生活在过去几年里发生了很大变化。

For the last few years, I went to work on the underground.

过去几年，我乘地铁去上班。

Over the last few years, I have been studying Chinese.

年来，我一直在学习中文。

Over the last few years, her painting skills have improved.

年来，她的绘画技巧越来越好。

Over the last few years, we have met less and less.

年来，我们见面的次数越来越少。

Over the last few years, he has been working at this company.

年来，他一直在这家公司工作。

Over the last few years, our technology has made great progress.

年来，我们的技术有了很大的进步。

Rick has won five gold medals in the last few years.

里克在过去几年中赢得了五枚金牌。

Rick has won five gold medals(奖牌) in the last few years.

在过去的几年里，里克赢得了五枚金牌。