The dog is a friend of man because it judges him not by his station.
翻译：君子以节俭为德而避开危难，不可追求荣华而谋取禄位。
合作是解决我们今天面临的复杂能源挑战的关键。
The truth is rarely pure and never simple.
剖面图是建筑师最具揭示性的图纸。