In other words, after acquiring a solid base in English and returning to China, they have done little or nothing to build on that base.
换句话说，在打好了扎实的英语基础回到中国后，对于如何加强这一基础，他们没有做什么，或干脆什么也没做。
I feel hes doing something wrong, but I've got nothing to base it on.
我感觉他正在做某件错事，但我没有任何根据。
Many have later been proved wrong as our knowledge and technology improved, but if not for the earlier work, later scientists would have had nothing on which to base their research.
随着我们知识和技术的提高，许多在后来被证明是错误的，但是如果没有前面的工作，后来的科学家就没有他们探索的基础。
Many have later been proved wrong as our knowledge and technology improved, but if not for the earlier work, later scientists would have had nothing on which to base their research.
随着我们知识和技术的提高，许多在后来被证明是错误的，但是如果没有前面的工作，后来的科学家就没有他们探索的基础。
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