20年前问世的737飞机在同麦道公司的DC—P飞机展开激烈地竞争之后,曾在美国好几家航空公司赢得销路。但在70年代初一度有衰落的趋势,因为比737早3年问世的DC—P在某些地方更为先进。 The 737 aircraft that came out 20 years ago has competed with McDonnell Douglas’ DC-P aircraft and has won sales in several U.S. airlines. However, there was a tendency to decline in the early 1970s because DC-P, which was introduced three years earlier than 737, was more advanced in some places.