1.date back 追溯

例句:This method, a “ dance ” of healing diseases, can date back to ancient times in china.
此法源遠流長，最早可追溯到我國遠古時代起利導作用的舞dJpWr;NDQHzFrv[。

2.historic site 遺址

例句:Of course, Beijing is the ideal place for traveling, because there is no shortage of historic site.
當然，北京是一個很理想的旅游觀光的地方，因為那里從不缺乏古跡lml~H5[S@RGZ^nk。

3.split up 分裂

例句:Research suggests that children whose parents split up are more likely to drop out of high school.
研究表明，父母離異的孩子更容易從中學中途退學&KVdIpRe&7TeCKTX*=Eu。

4.come back 回來

例句:That is, until you come back.
當然，那得是在你回來之前u4!3KH**@*UsI(]*F6UM。