Conclusion: The healthy personality had positive effect on person's health.

结论健康的人格特征对个体的健康状况具有积极影响。

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The results indicated that thinning based on small DBH had positive effect on stand distribution.

结果表明，以小径木为间伐对象的间伐作业对林分胸径分布有正面影响；

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Applying sludge had positive effect on improving the quality of peanut, keeping and improving soil fertility.

污泥对改善花生品质，保持和提高土壤肥力具有作用。

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Most politicians in Lincolnshire believe that migrant workers have had a positive effect on the county's economy.

BBC: Cameron says British workers should replace EU migrants

But kid-crazy culture has had one positive effect for women, Pope said.

CNN: The mommy morning compromise

In this, too, California seems to have had a positive effect.

ECONOMIST: California��s power crisis