As with crypto-currency, records of who owns what are stored on a ledger that is maintained by thousands of computers around the world. These records can’t be forged because the whole system operates on an open-source network.
Photograph: Simon Hill
，详情可参考同城约会
Advances in organ and computer models are raising the prospect that some animal experiments could be eliminated. But there are still huge hurdles to overcome.
// 作用：缓存当前位置右侧的"参考身高"，快速判断能看到的人
（三）其他明知他人利用网络实施违法犯罪仍为其提供吸引流量等帮助的行为。