This is another difficult question, because the answer is different for everyone.这又是一个很难的问题，因为答案往往因人而异。 Malcolm Gladwell说对任何人来说要想对某事真正熟练，一般要花一万小时左右来做练习。Malcolm Gladwell writes that it takes, on average, 10,000 hours of practice and study for anyone to become truly proficient at somet...