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21世纪中期，温室效应累积的恶果已经使世界面目全非，两极冰冠消融，海平面上升，像威尼斯、纽约这样的城市已经不复存在。以最低的能耗谋求发展成为人类的指导方针，机器人得以普及，其制造技术取得了突破性的进展，科学家已经能够制造出外表与人无二的机器人。套用当时科学界的理论来说，这种类人机器人与真人的关键区别仅在于他们不能区分什幺是真正的爱——尽管只要打开他们身上控制爱的开关，他们就会对主人报以无限的爱。 In the middle of the 21st century, the accumulation of greenhouse effect has made the world totally different. The polar ice caps are melting and the sea level is rising. Cities like Venice and New York no longer exist. With the lowest energy consumption to seek development as the guideline of human beings, robots can be popularized, and its manufacturing technology has made a breakthrough. Scientists have been able to produce robots with the same appearance as human beings. According to the theory of the scientific community at that time, the key difference between humanoid robots and real people is that they can't distinguish what is real love - although as long as they turn on the switch to control love, they will repay their master with infinite love. 温斯顿夫妇本来有一个儿子马丁，但他十一岁时却被医生宣布为要永远躺在医院的休眠舱中。为了给妻子莫尼卡的生活增添乐趣，温斯顿领养了小机器人大卫。 | 
