乳制品行业有责任在环境管理方面发挥领导作用。
性别经济学并不是一个小众主题;它是理解现代经济体的核心。
The world is full of magic things, patiently waiting for our senses to grow sharper.
Today is difficult, tomorrow is more difficult, but the day after tomorrow is beautiful.
"Randomized experiments are the gold standard for causal inference, but they are not always feasible."