3 sentences

1. 经过缜密侦查，警方揭开了这起共谋的真相。

   jīng​guò zhěn​mì zhēn​chá, jǐng​fāng jiē​kāi le zhè qǐ gòng​móu de zhēn​xiàng.

   After a thorough investigation, the police uncovered the truth of this conspiracy.

   Source: Dong Chinese Dictionary

2. 警方经过缜密的调查，终于侦破了这起特大走私案。

   jǐng​fāng jīng​guò zhěn​mì de diào​chá, zhōng​yú zhēn​pò le zhè qǐ tè​dà zǒu​sī'àn.

   After a thorough investigation, the police finally solved this major smuggling case.

   Source: Dong Chinese Dictionary

3. 我弟弟是天蝎座的，他的性格比较内敛且心思缜密。

   wǒ dì​di shì Tiān​xiē​zuò de, tā de xìng​gé bǐ​jiào nèi​liǎn qiě xīn​si zhěn​mì.

   My younger brother is a Scorpio; he is quite introverted and meticulous.

   Source: Dong Chinese Dictionary