Unit7TextBTheSummerPalace
LanguageFocus
retreatv退却，撤退
e.g.Weretreatedbackdownthemountain.
potentadj.说服力强的;令人信服的
e.g.apotentargument/reason
corridorn.走廊，通道
e.g.Goalongthecorridor,turnleft,andyou'llseehisofficeinfrontofyou.
benevolentadj.仁慈的，善意的
e.g.abenevolentsmile/attitude