The concept of law involves the union of primary rules of obligation with secondary rules of recognition, change, and adjudication.
通信的基本问题是在一点精确或近似地复现另一点选择的信息。
Stories you read when you're the right age never quite leave you. You may forget who wrote them or what the story was called. Sometimes you'll forget precisely what happened, but if a story touches you it will stay with you, haunting the places in your mind that you rarely ever visit.
Children are the most honest critics; they will tell you exactly what they think.