但他们收效甚微
But they achieved very little
以上为机器翻译结果，长、整句建议使用 人工翻译 。
科学家曾打算找到治愈天花的方法，但他们收效甚微。
Scientists had intended to finds a cure for smallpox, but they got nowhere.
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尽管篮球明星姚明等名人都呼吁停止捕杀鲨鱼，但他们的行动收效甚微。
Pleas by celebrities likebasketball star Yao Ming to stop the killing of sharks have done little toquell the feeding frenzy.
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