频率为20次以上consumer social product likely频率为10次以上system activity reward stress expert concern university individual view opportunity hunt challenge process project amount ability rate radiation feature environment create crash advertise tend status reader per local highway brand assume physical instant focus fashion expand effective declare benefit adultDay Two频率为9次旳单词affect compete global policy account foundation involve lightening technology leak competition behavior community频率为8次旳单词range maintain action obvious primarily appeal detail decade pollution advantage culture autobiography leader accordingly plastic approve performance recognize factor enormous avoid shift source fulfill moral rank replace complexDay Three 频率为7次旳单词injury outcome insurance impression household claim personality