friends can exercise(t )at a fitness canter

canter 英语翻译A fitness center purchased a number of exercise machines a fitness center前面用at 还是on Fitness is important in sport,but of at least___importance a 英语翻译MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR T You don't get much exercise sitting at a desk all day like t 求翻译 A man can't have too many friends. Now, I can't move so easily. How can I improve my fitness? （） exercise at least twice a week can help you （） you can't be friends i can't hang out with my friends at night.这里hang out怎么解释? Tom doesn't have any friends because he doesn‘t talk.A.at al