精选优质文档-倾情为你奉上L56 Our neighbor, the river1、 boundary n.界线；边界 dispute 边界争端 line 边界线 science 边缘科学 between / of-The river determines the natural boundary between the two countries.这条河流成为这两国间的天然边界线。同根：boundless adj.无边的bound v.弹起；束缚2、 overtake v.1） 突然降临，意外的碰上be overtaken by a snow storm2） 追上，赶上（catch up with）-At last he overtook me at the finishing line. 3）袭击，压倒 be overtaken with fear害怕得要死take over 接收，接管-Johnson took over the chairmanship of the com
