行为由当前刺激情境和过去的强化历史决定。
可持续性不是一种趋势,而是乳制品农业的未来。
怀疑是受过教育的头脑的标志,甚至是姿态。
Every role I take on is a journey into the unknown, and that's what makes it thrilling.
The most important thing in science is not to solve problems, but to ask the right questions.
Ihate people who talk about themselves, as you do, when one wants to talk about oneself, as I do.