It was no defence to plead that they were only obeying orders.辩称他们只是在服从命令站不住脚。In justification of his conduct, he pleaded that he was merely obeying orders.他推说他仅是在遵照命令行事来为自己的行为辩解.A material obeying ohm's law is call...
Skipping is one of the most enjoyable aerobic activities.跳绳是最有乐趣的有氧健身运动之一。Walking, done in the right way, is a form of aerobic exercise.走路，如果方法正确的话，也是一种有氧健身运动。Aerobic exercise helps to build up stamina.有氧健身操有助于增强耐力....