Reflection on the past is the source of wisdom for the future.

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

Every piece of plastic we produce should have a clear path to reuse or recycling.

The act of writing is an act of hope.

译文：纵览历史，凡是贤明的国和家，成功源于勤俭，衰败起于奢华。赏析：节俭不是吝啬，是对钱财的合理利用。不管何时，我们都要有忧患意识，保持俭朴的作风。