英语翻译TheFrenchscientistswhoperformedthestudywarned,however,thatthegeldoesnotpreventcavities.这句话HOWEVER以前的部分帮我翻译一下我不知道performedthestudywarned什么意思帮个忙,谢谢啊

Question

英语翻译
The French scientists who performed the study warned, however, that the gel does not prevent cavities.
这句话 HOWEVER 以前的部分帮我翻译一下
我不知道 performed the study warned什么意思
帮个忙,谢谢啊

Answer 1

The French scientists (who performed the study ),warned,
那个,进行了研究的,法国科学家,警告到:
括号内是定语从句.
that the gel does not prevent cavities.
凝胶不能防止蛀牙.