一个问题的价值与其说在于得出答案,不如说在于它迫使潜在的解决者产生的想法和尝试的想法。
严厉的家庭没有凶悍的奴仆,而慈爱的母亲却会有败家的儿子。
Every piece of plastic ever made still exists somewhere - that's not just a fact, it's our responsibility.