Work can be a double-edged sword, in that it can stimulate brain activity, but at the same time long working hours can cause fatigue and stress, which potentially damage cognitive functions.
工作是一把双刃剑，既能够刺激大脑活动，同时过长的工作时间也会导致疲劳和压力，并有可能损害认知功能。
But freedom is a double-edged sword, which can be used to not only protect our own rights, but also damage others' rights.
但是，自由有双刃剑的作用，它既可捍卫自身的权利、又可伤害别人的权利。
Power is a double-edged sword. It may bring interests to the society and may bring damage as well.
权力是一把“双刃剑”，既可能给社会带来利益，也可能给社会带来危害。
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