Study: Auto Assist Systems Struggle in Real-World Situations A new study has found that driver assistance systems fail to perform some actions in real-world test situations. 一项新研究发现,辅助驾驶系统在真实测试中未能执行一些

发表于:2018-11-27 / 阅读(417) / 评论(0) 分类 2018年VOA慢速英语(十一)月

Every hunt presents a different challenge, so he plans a new strategy each time. He slinks into the water, using a channel between the ice floes to act as cover. He swims, hardly making a sound, reaching six miles per hour at times. His front legs pr

发表于:2018-12-26 / 阅读(44) / 评论(0) 分类 自然百科2010年

THE PRESIDENT: You know, one of the great things about our country is the number of people who volunteer during one of these incidents. Here are some Red Cross volunteers. They are -- they symbolize the thousands that will help. And my call to our f

发表于:2018-12-30 / 阅读(49) / 评论(0) 分类 美国总统每日发言