Doubt has objective basis and has positive effect in the course of knowledge.

疑问是有客观根据的；疑问在认识过程中有着积极的作用。

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Flood water has positive effect on improving environmental conditions of river basin.

洪水对生态环境的改善产生了积极的影响。

youdao

Conclusion: The traditional medicine has positive effect on CHB, it is worth spreading.

结论中医药治疗慢性乙肝疗效好，值得推广。

youdao

When something good happens, faith has a positive effect, the aura of it.

NEWYORKER: The Hardest Vote

In one respect, the scandal over Mr Grasso's pay has had a positive effect: it has accelerated changes that critics felt were long overdue at the exchange.

ECONOMIST: The people’s lawyer strikes again | The

There are a wide range of studies demonstrating that acupuncture has a positive effect, including evidence to suggest it works by deactivating pain centres in the brain.

BBC: NEWS | Health | Medical notes | Complementary medicines: A guide