他们都是很好的人，但是很遗憾的是现在我看不到过去那种孩子在公园里玩的景象了。

They"re nice people, but I miss seeing all the young kids playing in the park the way it used to be in the old days."

youdao

我们很欣赏你们产品的优良质量，但是很遗憾的是由于你们的费用我们将不采用你们的报价。

we appreciate the good quality of your goods but unfortunately we are not going to accept the offer on your terms.

youdao

但是很遗憾的是，这就是我们称之为的进步，如果你细看我们国家科技的每个领域就会发现我们每前进一步就要失去一些体力劳动的岗位。

But this is what we call progress, Unfortunately, If you look at every area of technology in this country, as you advance there are fewer and fewer manual-type jobs.

youdao

But, unfortunately, there aren't good animal models for many of the diseases that we'd like to study.

但是很遗憾的是,对于很多我们想要研究的疾病,并不能找到合适的动物模型

耶鲁公开课 - 生物医学工程探索课程节选