I don't sing because I'm happy; I'm happy because I sing.
理性预期假说并不意味着人们能完美预测未来;它意味着人们不会犯系统性错误。
The Celts have a close affinity with nature.
The walls of a garden should be high enough to keep the world out, but low enough to let the sky in.
花园的墙应该足够高以将世界挡在外面,但又足够低以让天空进来。