Some people may need to take medicines before they work hard or exercise.
VOA: special.2009.07.28
It's good review exercise for some of you who have taken 115 or are about to take 150 or are there now.
对于学过115或者想要学习150的同学,这是一个不错的复习案例
5% of adults and half of all children do not take the recommended amount of exercise."
5%的成人,和一半的儿童都达不到推荐的锻炼量"
应用推荐