It is difficult to make a comparison with her previous book—they are completely different.
这很难与她以前的书相比—两者是截然不同的。
In comparison with the previous study, the new study expanded research subjects.
与之前的研究相比，这个新的研究拓宽了研究主题。
In comparison with the previous study, the new study expanded research subjects.
与之前的研究相比，这个新的研究拓宽了研究主题。
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