全红婵介绍自己过去3年的训练时表示,自己因为身体发育需要不断修改动作,训练特别辛苦
生命之援助,这就是教育。
The truth is rarely pure and never simple.
Health is not a privilege of the rich, but a vulnerability of the poor.
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.