净化社会风气以抵御不良思想的侵袭。
Purify the spirit of the society to resist invasion of unhealthy thought.
我们需要净化社会风气，并为人类创造更好的环境。
We need to clean the social climate for a better humane environment.
这种价值观念显然能够净化社会风气、大大降低市场交易成本。
This value idea can obviously purify the mood of society and reduce market transaction costs greatly.
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