The trade-off between bias and variance is a fundamental concept in machine learning.

I believe that everything happens for a reason. People change so that you can learn to let go, things go wrong so that you appreciate them when they're right.

书说：她这么做是因为。生活说：她这么做了。书是向你解释事情的地方；生活是事情不被解释的地方。我不奇怪有些人更喜欢书。

The only real happiness comes from squandering ourselves for a purpose.