化学的艺术在于能够分离、识别并确定构成物质的成分及其数量。
To talk about painting is not only difficult but perhaps pointless too.
"The poem is a place where the unspeakable can be spoken."
话语伦理学旨在通过所有受影响者之间的理性话语程序来证明道德规范的正当性。