双语例句原声例句权威例句
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I know for certain that miracles happen, but only for those who hang on to hope.
我确信世上有奇迹，但奇迹只会发生在抱持希望的人身上。
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But more research needs to be done before we know for certain that TwHF extract works and is safe.
不过，在我们确切地了解雷公藤提取物有效而且安全之前，还需要进行更多的研究。
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We cannot know for certain that more wealth and better health directly lead to higher self-esteem, but it does appear to be linked in some way.
我们还不能肯定，为什么更多的财富和更好的健康，会直接导致他们有着较高的自尊心。但它们之间似乎存在有着某种联系。
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Today we know, for example, if you can put one certain kind of element in your mouth or eat that, it doesn't necessarily mean you want to put the element next to it and your mouth as well, that might not be safe.
现在我们知道了，比如，即使你能把某一种元素放进嘴里,或者吃下去，这也并不一定意味着,你会把它邻近的元素也吃进嘴里,这可能会有危险，但。
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