The meaning of a sentence is not just in the words themselves， but also in the illocutionary act it performs.

The hardest decisions often require the simplest question: 'What's right for the long term?'

All women become like their mothers. That is their tragedy. No man does, that’s his.

史记

合成材料的未来在于在分子水平上理解和控制聚合物的结构。