在飞机飞越高山或是田野等等时,何时用fly over ,何时用cross?请帮忙解答。
能结合我以下这几句句子为我分析以下么:
1.The plane crosses the United States from east to west in about five hours. 飞机从东向西飞越美国需五小时。
2.The plane is soon flying over the gentle slopes of the mountains.飞机不久便飞越这座高山平缓的山坡。
3.Then,for hundreds of kilometers it crosses the fertile fields of the farm belt of the great Middle West.接着在大中西部农业地带绵延数百公里的肥沃田野的上空飞行。
4.The plane flies over vast prairies and rough cattle-grazing country.飞机飞越过辽阔的大草原和坎坷起伏的牧场。
5.After crossing these high ranges,the plane.... 飞机越过这些崇山峻岭后,。。。。