n. the work of inquiring into something thoroughly and systematically
n. 调查, 审查
[医] 调查, 调查研究
1. The police launched an investigation into the robbery.
警方对这起抢劫案展开了调查。
2. The investigation revealed important evidence.
调查揭示了重要的证据。
3. She is working on an investigation about climate change.
她正在进行一项关于气候变化的调查。