positive emulsion

例句：

1. 1. The positive emulsion was used to treat skin conditions.
   该正乳剂用于治疗皮肤疾病。
2. 2. In the process of mixing, the oil and water are evenly distributed in the positive emulsion.
   在混合过程中，油和水均匀地分布在正乳剂中。
3. 3.The positive emulsion is a stable system that can be easily controlled by adjusting the ratio of oil and water.
   正乳剂是一个稳定的系统，可以通过调整油和水的比率来轻松控制。