Melamine has also been shown to have carcinogenic effects in animals in certain circumstances, but there is insufficient evidence to make a judgment on carcinogenic risk in humans.

三聚氰胺也被证明在某些情况下对动物有致癌影响，但没有足够的证据判断其对人类的致癌风险。

youdao

There are also certain psychological factors that tend to enhance the risk of alcoholism.

一些心理学上的因素同样增加了酗酒的风险。

youdao

While you never can be completely prepared to lose your livelihood, there are certain signs that may indicate that your job could be at risk.

虽然你永远不会完全失去生计，但是你的工作如果正面临危机的话肯定还是会有一些征兆的。

youdao

So there's risk involved and a certain degree of difficulty in actually making the contact and getting to the right people.

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If your financial situation requires a more conservative stance, there is nothing wrong with trailing certain benchmarks if your level of risk is reduced accordingly.

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Although none of these risk factors is a certain predictor of snapping, there are associated warning signs, Raison said.

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