There have been no studies of the effects of a low carbohydrate diet on pregnancy, so its effect on the fetus, if any, is unknown.

目前还没有关于怀孕时低碳水化合物饮食影响的研究，因此如果它对胎儿有什么影响也是不知道的。

youdao

There's also been a great increase in the number of networking sites devoted to sharing advice on health issues but there are as yet no studies to prove the reliability of that advice.

致力于分享健康问题建议的社交网站的数量也在大幅增加，但目前还没有研究证实这些建议的可靠性。

youdao

There are no studies that address physiological changes when someone drinks an alcoholic energy drink.

没有涉及饮用酒精性功能饮料的人体生理性变化的研究。

youdao

He says those studies showed no real difference when a used pacemaker was compared to a new one.

VOA: special.2010.06.29

An analysis of four studies found no difference in short-term survival when rescuers followed current guidelines.

VOA: special.2010.09.15

That risk was based on smaller studies." A study on Avandia funded by GlaxoSmithKline published last year, found no increase in heart attacks.

VOA: standard.2010.03.02

Agarwal's example indicates that India's new young do not just want all fun and no studies.

CNN: Tuned In To Hip

Yet there were no studies of fossils showing how the pygmy whale had evolved, Marx said.

MSN: Found: Whale thought extinct for 2 million years

No studies can be made if the dam is going to be located in a protected area.

FORBES: Brazil, Saviours Of The Amazon