//@TOEFL托福英语: 1.heavy and light 轻重；2.twos and threes 三三两两；3.rain or shine 无论如何；不论晴雨；4.back and forth 来回地；一来一往；5.sooner or later 早晚；6.ancient and modern 古今；7.home and abroad 国内外；8.profit and loss 盈亏帐目，损益展开全文
【成双成对的词】1.heavy and light 轻重；2.twos and threes 三三两两；3.rain or shine 无论如何；不论晴雨；4.back and forth 来回地；一来一往；5.sooner or later 早晚；6.ancient and modern 古今；7.home and abroad 国内外；8.profit and loss 盈亏帐目，损益展开全文
