知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。" Mitchell was born in Alberta and grew up in Saskatchewan, but she had been living in the U.S. for three several years (and California for 2) by 1970, so I don't know in which she picked up the expression "for free."The farther "free, white, and 20