The school bus takes them to school and brings them back.校车接送他们上下学。The school bus leaves at six sharp and won't wait.校车6点开车,过时不候.What bad luck ! I've missed the school bus.真糟糕,误了校车了....
目的 探讨小儿反复呼吸道感染 ( RRI ) 与胃食管返流 ( GER ) 的关系.Objective To study the relationship between recurrent respiratory infection ( RRI ) and gastroesophageal reflux ( GER ) in children.绝大多数瓣膜返流轻微或轻度, 且只发生于一组瓣膜.Most of regurgitation...