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question		réponse
breakthrough commencer à apprendre		a sudden, dramatic, and important discovery or development
great leap commencer à apprendre		significant and notable progress; a huge step/jump forward
revolutionize commencer à apprendre		change (something) radically or fundamentally
decade commencer à apprendre		10 years
cell commencer à apprendre		the smallest structural and functional unit of an organism
tremendous commencer à apprendre		very great in amount or level, or extremely good
far-fetched commencer à apprendre		very unlikely to be true, and difficult to believe
inconceivable commencer à apprendre		impossible to imagine or think of
propel commencer à apprendre		push or move something somewhere, often with a lot of force
cost-effectively commencer à apprendre		saving or making a lot of money in comparison with the costs involved

lesson 150