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rather than而不，不
例句：It is too late. You should go to bed rather than watching the TV.
太晚了。你该睡觉了，不能再看电视了。
2.Had we done tax cuts, we would have put that purchasing power in the hands of individuals and firms, and that would have lead on average to much better decisions about how that extra demand would have been spent.
Had引导倒装句，表示与过去事实相反的虚拟语气。
on average平均，按平均数计算
例句：On average the battery will last between 2-3 hours.
平均来说，电池可以持续供电2-3小时。
