look-ahead的用法和样例：
词汇搭配
- pipelined look-ahead carry 流水线先行进位...
- instruction look-ahead unit 指令先行部件...
- carry look ahead adder 超前进位加法器...
- look ahead strategy 先行策略
- carry look ahead 先行进位法,先行进位...
- look ahead system 超前式
- look ahead for 预见到(为 ......
- array look-ahead adder 数组先行加法器...
- look ahead 考虑未来
- look ahead to 向前看
