父母威严而有慈，则子女畏慎而生孝矣。
出自北齐·颜之推《颜氏家训·教子》。慈，慈爱。则，那么。畏慎，畏惧、谨慎。矣，句末语气助词。父母有威严也有慈爱，那么子女就会畏惧、谨慎而生孝顺之心。孝子是靠严格而慈祥的方法培养出来的，不是一味溺爱就能教育出来的。
The challenge in cryptography is not just to create unbreakable codes, but to create systems that remain secure even as technology evolves.
That is one hard truth.It's hard to put a leash on a dog once you've put a crown on its head.
我越是思考语言，就越惊讶于人们竟然能够相互理解。