大多数认为非但无害而且可能还是有益的。
Most believed that it wasn't harmful to society and could, in fact, be beneficial.
灵长类泡沫病毒可以感染人类但无害，但研究人员担心它们可能会演变成具有危险性。
Primate foamy viruses can infect humans harmlessly, but researchers fear they may evolve to become dangerous.
对男性而言，这种“自我压抑”可能只是为了息事宁人，有所盘算但无害的决定。但是妇女隐忍不言，身体得付出惊人的代价。
For men, it may simply be a calculated but harmless decision to keep the peace. But when women stay quiet, it takes a surprising physical toll.
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