The past is never dead. It's not even past.

Every mathematical theorem is a story waiting to be told, a mystery waiting to be unraveled.

你不需要很厉害才能开始，但你必须开始才能变得厉害。

The best companies don't just sell products—they inspire change.

The worse a situation becomes, the less it takes to turn it around, the bigger the upside.

解释：每种药材的生长都有其特定的环境和条件，说明药材产地与品质的关系。

不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。