For research purpose intensive observations were made for that period.
为了研究目的,在那个期间进行了加密观测。
Your information will only be used for research purpose but not to be disclosed.
您所提供的资料不会对外公开,并只会用作研究用途。
For research purpose, network with stations speed only 1/10 to 1 miles apsrt have been maintained for limited period in small areas.
为了研究需要,在短时间内在小范围一直保持台站间彼此相距仅0.1到1英里的台站网。
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