他此刻正在南美旅游观光。He's touring South America at this moment in time.因为正在使用很多昂贵的设备，所以我非常紧张。I get very nervous because I'm using a lot of expensive equipment.我们正在成为时装业的领军者之一。We are becoming one of the market leaders in...
When John was 17, he died of congenital heart disease.约翰17岁时死于先天性心脏病。a congenital inability to tell the truth生就的不会说实话He has a congenital heart defect.他有先天性心脏缺陷....