save sb.the trouble of doing sth. to make somebody able to avoid extra effort or work 省去了.烦恼 快餐店之所以受欢迎，是因为它省去了人们做饭 的烦恼 Fast-food restaurants are popular because they save people the trouble of cooking.save sb. the trouble of doing sth. to make somebody able to avoid extra effort or work 省 去 了:. 烦 恼. 快 餐 店 之 所 以 受 欢 迎, 是 因 为 它 省 去 了 人 们 做 饭 的 烦 恼. Fast-food restaurants are popular because they save people the trouble of cooking