Persistence is key in mathematical research; many great results come from long struggles.
What other dungeon is so dark as one's own heart! What jailer so inexorable as one's self!
Be scrupulously truthful, even when truth is inconvenient, for it is more inconvenient when you try to conceal it.
Empowering local communities is the foundation of ocean conservation.
黄芩(唾手可得)没有造假,阿魏(稀有昂贵)容易造假。