核心詞義
adj. 負(fù)擔(dān)沉重的；難以承擔(dān)的；繁重的
精選例句
高考
1、 Since the dawn of human ingenuity,people have devised ever more cunning tools to cope with work that is dangerous,boring,burdensome,or just plain nasty.
自從人類有了聰明才智以來，人們就設(shè)計(jì)出越來越狡猾的工具來從事危險(xiǎn)、枯燥、繁重或純粹是骯臟的工作。
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