随机实验是因果推理的黄金标准,但它们并不总是可行的。
传统养殖方法与现代技术的结合是成功的关键。
Innovation is not just about technology; it's about changing the way people think and act.
最大的风险是世界在变化时我们停滞不前。
I'm the reason your boyfriend's so stressed.