这座城市建在岩石上，四周筑有城墙。The city was walled and built upon a rock.一段石阶从鹅卵石路上一直向上直通城墙。A number of staircases ascend from the cobbled streets onto the ramparts.古老的荷兰城堡城墙又厚又高，看起来几乎固若金汤。The old Dutch fort with its thick high walls ...
Old memories constantly recurred to him.往事经常浮现在他的脑海里.She always winced when he recurred to the subject of his poems.每逢他一提到他的诗作的时候,她总是有点畏缩.The name of Mozart recurred frequently in his conversation.在他的谈话中,莫扎特的名字一再地被提到....