My work is a form of archaeology, digging up forgotten stories.
我总是很高兴地想到,我的教育大部分是非正式的,并且根植于现实世界。
"In observational studies, we often have to rely on assumptions that are not directly testable."
In business, if you're not moving forward, you're falling behind.
解释:在人活动范围内的水就污浊,在野外无人地方的水就清洁。同为一样的水,都是从天边开源,有的混浊有的清洁,这是它们所处环境使它们这样的。