he was also the first chinese pianist in the 70_year shistory of the competition to win this prize.中间为i什么是70—year而不是70years
问题描述：
he was also the first chinese pianist in the 70_year shistory of the competition to win this prize.
中间为i什么是70—year而不是70years
答
He was also the first Chinese pianist in the 70-year history of the 他同时也是中国首个赢得这个具有70年历史的比赛的钢琴家 希望能帮到楼主 ..
答
70-year 是 一个词 ,而且是形容词 ，可以修饰名词
70 years 是两个词，而且是名词，
答
这里70-year作为形容词修饰后面的history
而分开的70 year只能作时间名词,不能修饰另一个名词
答
70和year用杠连接作形容词 70years后面不加东西