这是第一次正式以实地实验的方式对这个问题进行检验。
This was the first experiment to formally put that question to a practical test.
对这一问题实际上还没有进行过科学实验。
Practically no scientific experiments have yet been made on this question.
作者对实验结果进行了认真总结，提出了新的需要解决的问题。
The results of the experiment are analyzed carefully and new questions are brought forward.
文中对实验中存在的问题，也作了一些讨论。
Some questions concerning the experiment were also discussed in this paper.
然后，介绍了他们对这个问题进行的调查和实验研究。
Then, they introduced their investigation and experiment on this problem.
然后，介绍了他们对这个问题进行的调查和实验研究。
Then, they introduced their investigation and experiment on this problem.
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