失业对我国的经济起着破坏作用。
在这种条件下，细菌的破坏作用就会减弱。
Under such conditions, the destructive effects of bacteria are diminished.
海克米说，自由基确实会产生破坏作用，但是在正常范围内，它的积极作用或许更为明显。
Free radicals do cause damage, Hekimi said, but at normal levels their beneficial effects are perhaps more important.
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