Scientists have sounded a note of caution on the technique.

科学家已告诫人类慎重对待这项技术。

《牛津词典》

Some scientists have voiced concern that the disease could be passed on to humans.

一些科学家已经表示，担心这种疾病可能会传染给人类。

《柯林斯英汉双解大词典》

Scientists have established a connection between cholesterol levels and heart disease.

科学家已证实胆固醇含量与心脏病之间有关联。

《牛津词典》

Other scientists have shown that sun spot activity can be measured in periods of time that last about eleven years.

VOA: special.2009.09.29

And I don't know why, but since time immemorial that is the way computer scientists have drawn trees.

叶子是在最下面的，我不知道为什么,但从记事以来他们就是这么画树的,这也许就是为什么我们。

麻省理工公开课 - 计算机科学及编程导论课程节选

Researchers and scientists have been able to improve quality of life recently exponentially

研究者和科学家能够大幅度提高人类的生活质量，

需要动物实验吗？ - SpeakingMax英语口语达人

To avoid contaminating the little critters, scientists have to shower and scrub before entering mouse quarters.

FORBES: Crossbreed

Over the last few years, scientists have begun studying the way cell phones affect the human experience.

CNN: A New Year's resolution for the workplace

Scientists have checked the map against the distribution of matter obtained by other means.

BBC: Science & Environment