sth.can trace back to xxx还是sth.can be traced back to xxx?
be traced back to
it can be traced her fear of water back to a childhood accid
be back to do sth 中back 是什么词性?
give sth back to sb还是give back sth to sb
是can to do sth.还是can do sth.
give sth back to sb/return sth to sb造句
The first lodging operations can be traced to ancient Greenc
有没有 go back to doing sth?
The custom of giving gifts at Christmas can be traced back t
求dated from ,dated back to ,be traced to 的区别,
attempt to be sth 还是 attempt sth
有没有give sth.back to sb.和return sth.back to sb.