Her questions have caught the department chairperson flat - footed.(她的问题,使系主任惊讶.)Ducks are web - footed to help them move through the water.鸭子脚上有蹼,便于游泳.The wing - footed messenger Hermes ( Mercury ) was the god of commer...
You should drive at the speed of traffic.你应该以规定的速度行驶.Jim let drive at the man, but the blow missed.吉姆向那个人瞄击, 但没打着.He let drive at with a stone.他拿一块石头向我投来....
Some backtracking is probably inevitable.有时改变决定可能是不可避免的。Leonard jumped in his car and started backtracking.伦纳德跳进车里，开始原路折返。The backtracking mechanism is an important facility for programming in logic.回溯机制是逻辑程序设计的重要设施....