The treatment will be tried out on human beings only after it has been shown to be safe and foolproof in animals.

该疗法只有在动物身上证明安全、万无一失后才会在人体上试用。

《柯林斯英汉双解大词典》

To date, it has been shown to be safe.

到目前为止，它证明是安全的。

youdao

It has been shown that such metrics are related to quality.

有资料表明这些指标与质量相关。

youdao

It can ensure that poor,rural people, whose lives and livelihoods, depend on the earth's productive capacity, have the means to produce more and to produce it better, GDP growth generated by agriculture has been shown to be at least twice as effective in reducing poverty as growth in other sectors. In recent years, more attention is being paid to the importance of smallholder farms.

VOA: standard.2010.03.29

It has been shown that even today people seem to think that.

即便如今,人们似乎仍然无法理解概率

耶鲁公开课 - 金融市场课程节选

It has been shown that just 2% dehydration does affect concentration, and also makes you irritable.

BBC: Caffeine 'reduces productivity'

And it has been shown that the African Union troops, where they have been present, have been somewhat effective.

NPR: What the U.S. Can Do to End Violence in Darfur

Recently, it has been shown that germ-cells, too, are subject to epigenetic change, sometimes in response to environmental stimuli.

ECONOMIST: Richard Dawkins under fire