1. The study showed promising results in the development of a new microbicide for preventing the transmission of HIV.
这项研究在开发一种预防HIV传播的新型微生物杀菌剂方面取得了有希望的结果。

2. Microbicides are being researched as a potential tool for reducing the spread of sexually transmitted infections.
微生物杀菌剂正在研究中，作为减少性传播感染传播的潜在工具。