He made a careful study of the problem.
他仔细地研究了这个问题。
We have made a careful study of the feasibility of the project.
我们仔细地研究了这个项目的可行性。
This paper made a careful study on"abnormal" nuclear phenomena in experiment of the.
本文对冷核聚变实验研究中出现的“异常”现象作了深入的研究；
The Japanese sociolinguistic circles made a careful study of people's linguistic behavior, and expounded the origin of linguistic variance.
日本社会语言学界对人们的话语行为作了细致研究，探讨语言变异是怎样产生的。
Then, they made a further careful study, analysis and test of the four possibilities one by one, gradually ruling out three of them.
此后，中方通过对这四种可能的故障模式进行逐一、深入、细致的调查分析和试验验证，陆续排除了其中三种。
Then, they made a further careful study, analysis and test of the four possibilities one by one, gradually ruling out three of them.
此后，中方通过对这四种可能的故障模式进行逐一、深入、细致的调查分析和试验验证，陆续排除了其中三种。
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