QA问答：如果钻石是最硬的材料，我们为什么不用钻石做防弹背心呢？
正文翻译
If diamond is the hardest material, why don't we make bulletproof vests out of diamond?
如果钻石是最硬的材料，我们为什么不用钻石做防弹背心呢？
If diamond is the hardest material, why don't we make bulletproof vests out of diamond?
如果钻石是最硬的材料，我们为什么不用钻石做防弹背心呢？
评论翻译
If diamond is the hardest material, why don't we make bulletproof vests out of diamond?
如果钻石是最硬的材料，我们为什么不用钻石做防弹背心呢？
If diamond is the hardest material, why don't we make bulletproof vests out of diamond?
如果钻石是最硬的材料，我们为什么不用钻石做防弹背心呢？
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