正效果 meaning in Chinese

plus effect

Detailed simulations on rain enhancement with a rocket fired at different time , elevations , distances and seeded in different areas of cloud were analyzed . the results show that a positive effect of rainfall enhancement can be obtained when seeding in suitable parts of the clouds
结果表明，利用火箭在对流云中适宜的部位进行人工播云催化作业是有正效果的；在云发展阶段进行催化，增雨效果较好；火箭发射仰角对增雨的效果有很大影响。