慢速英语:Open a Window, It's Smoky in Here!

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1. investigate vt.调查; 研究; 审查
例句：The detective was sent to investigate the crime.
那位侦探被派去调查该罪行。

2. prove vt.证明，证实
例句：Please prove your identity.
请证明你的身份。

3. criminal n.罪犯，犯人
例句：He continued to lecture on criminal law at Rome University.
他继续在罗马大学教授刑法。

4. explore vi. 勘查， 探测
例句：She was about to explore another life with Frank.
她将和弗兰克一起去开辟新的生活。