To understand the present, we must first confront the past.
解释:国家垂危败亡,一定是因为任用了奸邪小人。
我爱你,不是因为你是一个怎样的人,而是因为我喜欢与你在一起时的感觉。
Model checking is a powerful tool for verifying the correctness of hardware and software systems.