The best way to learn mathematics is to do mathematics.
真实是一个不断的过程,而不是一个静止的状态。
从30英尺外看,她看起来很有气质。从10英尺外看,她看起来像是为了从30英尺外看而打扮的。
You have to be willing to fail, to be wrong, to start over again with lessons learned.
When we no longer have the power to change a situation, we are challenged to change ourselves.