4 sentences

1. 品牌计划在社交媒体上投放更多广告。

   pǐn​pái jì​huà zài shè​jiāo méi​tǐ shàng tóu​fàng gèng duō guǎng​gào.

   The brand plans to place more advertisements on social media.

   Source: Dong Chinese Dictionary

2. 这批新产品的质量完全过关，可以投放市场。

   zhè pī xīn chǎn​pǐn de zhì​liàng wán​quán guò​guān, kě​yǐ tóu​fàng shì​chǎng.

   The quality of this new batch of products is fully up to standard and can be put on the market.

   Source: Dong Chinese Dictionary

3. 由于广告精准投放，新用户的转化比率大幅提升。

   yóu​yú guǎng​gào jīng​zhǔn tóu​fàng, xīn yòng​hù de zhuǎn​huà bǐ​lǜ dà​fú tí​shēng.

   Due to precise ad targeting, the conversion rate of new users has increased significantly.

   Source: Dong Chinese Dictionary

4. 救援飞机向受灾的偏远山区投放了生活物资。

   jiù​yuán fēi​jī xiàng shòu​zāi de piān​yuǎn shān​qū tóu​fàng le shēng​huó wù​zī.

   Rescue planes dropped supplies to the remote mountainous areas affected by the disaster.

   Source: Dong Chinese Dictionary