美国地质调查局和TA在加州的合作机构正在调查研究一个地震早期预警系统会给加州带来什么好处。
The United States Geological Survey (USGS) and partner organizations in California are doing research to understand what benefits an earthquake early warning system might have in California.
带着这些疑问，笔者对证券公司的风险处置工作进行了比较系统的调查研究。
Urged by these questions, I have made a systematic investigation and study over the risk disposition issues of securities companies.
海岸带陆源氮磷污染输入是导致近海赤潮的主要原因，但目前尚缺乏系统的调查研究。
Although the terrestrial input of nitrogen and phosphorus arc main factors that cause the red tide in the near shore, little systematic research and investigation has been undertaken.
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