Contact lens technology has changed dramatically from the time that I was born to the time that you were born, and the contact lenses you use today are much different than the ones that would have been used 30 years ago.

从我出生,到你们出生的时间段里,隐形眼镜技术发展的很快,你们现在使用的隐形眼镜,与三十年前使用的,已经有天壤之别

耶鲁公开课 - 生物医学工程探索课程节选

We're in a time period where the economy has changed dramatically in the last few years.

我们现在所处的时期在前几年经历了巨大的经济变化。

现在的商业新闻 - SpeakingMax英语口语达人