每日英语：有关话题讨论的句子

She felt nervous at having to sing before so large an audience [such a large audience]. 5.我们从小就相信男人的角色市提供生活所需，女人的角色是照顾家庭和子女。然而，今天，角色的互换变得越来越普遍。 We were brought up to believe that the role of a man was to provide and the role of a woman was to care for the household and family. Today, however, role reversal is becoming increasingly commonplace. 6. As probably the least strenuous, safest aerobic activity, walking is the most acceptable exercise for the greatest number of people. Walking at comfortable speed improves the efficiency of the cardio-respiratory system by stimulating the lungs and heart, but at a more gradual rate than most other forms of exercise.(英译汉) 散步是一种最不激烈、最为安全的有氧运动，对绝大多数人都极其合适。以舒适的速度步行能促进心肺活动，从而提高心肺功能，虽然比起其他各种运动方式来散步的作用较为缓慢。