Scientific research is widely claimed to be the source of the high standard of living in the US.

在美国，科学研究被广泛认定为高生活水平的来源。

the use of animals in scientific experiments.

科学实验中对动物的使用。

There has been a certain amount of scientific research into meditation.

关于冥想已有一些科学研究。

It's not a scientific way to test their opinions.

这样检验他们的观点不科学。