求dated from ,dated back to ,be traced to 的区别,

1.date from =date back to 追溯到 常用一般现在时,没有被动语态,用其现在分词作定语.
trace 也可以当不及物动词 意思是回溯；追溯 ,
The friendly relationship between the two countries traces back to/dates back to/dates from the last century.
两国间的友好关系追溯到上个世纪.
此时,三个词组用法一样,都表示从什么时间算起.
2.但是trace还可以作及物动词 ,意思很多,也可以表示追溯；探索
The book traces the history of social development.
这本书追溯了社会发展史.
此时,trace 可以有被动语态 be traced to 找出根源,追溯至
The friendly relationship between the two countries can be traced to the last century.
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