The children in question were randomly selected from a previous study on autism.
被试儿童是从之前一个有关自闭症的研究中随机选出的。
Four of the patients on this study had previous surgery, but their tumor grew back.
在与该研究相关的患者中有4人之前曾接受过手术，但之后其肿瘤又恢复生长。
On the basis of previous findings and those of this study.
根据早先研究结果和那些这研究。
This thesis is just the farther study on the basis of the previous work.
本文卽在前人的基础上做了进一步的研究。
This thesis is just the farther study on the basis of the previous work.
本文卽在前人的基础上做了进一步的研究。
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