孤独不是缺乏陪伴，孤独是缺乏目标。
The journey of science is not just about finding answers, but about asking the right questions.
Learning involves the gradual adjustment of connection strengths between units in a network.
柠檬问题是指买家无法确定产品质量，因此只愿意支付反映平均质量的价格。