随机评估可以帮助我们了解发展中哪些措施有效,哪些无效。
Food security is the cornerstone of national security.
大脑是一种计算机,但它与我们习惯的计算机非常不同。
I can't relate to lazy people. We don't speak the same language. I don't understand you. I don't want to understand you.