摘要： Some psychologists argue that the traditional idea “spare the rod and spoil the child” is not rational（sensible）合理的一些心理学家认为,传统观念“闲了棍子,惯了孩子”是不合理的Provid 阅读全文

摘要： Hyundai has shown off a small model of a car it says can activate robotic legs to walk at 3mph (5km/h) over rough terrain.Also able to climb a 5ft (1. 阅读全文