As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks.我们一路南行，乡间开始变得起伏不平，绵延的山峦一直延伸到河岸。To undulate more freely, keep you hands about shoulder width apart.要波动的更自由些, 保持你的手与肩...
As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks.我们一路南行，乡间开始变得起伏不平，绵延的山峦一直延伸到河岸。To undulate more freely, keep you hands about shoulder width apart.要波动的更自由些, 保持你的手与肩...
表示某人没义务做某事.State some body is under an obligation to do something.询问你是否不义务做某事.Asking if you are under an obligation to do something.有义务(做某事 )Be in duty bound to do sth....
He slipped his arm around her waist and urged her away from the window...他揽住她的腰，拉着她离开了窗边。She wore a brown suede jacket, belted at the waist.她穿着一件带束腰的棕色绒面革夹克。The doctors also wore guns at their waist.医生们的腰间也带着手枪。From her ...