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重点讲解：
1. up to 高达；多达；
He estimated that up to 100 companies now have "hundreds of millions in revenue and profitability and are ready to file" .
他估计，目前有多达100家公司拥有“数亿美元的收入和利润，已准备好申请上市。”
2. move away from 远离；
You may change your job, or be forced to move away from familiar territory.
你也许会换工作，或者被迫离开熟悉的领域。
3. be similar to 相像的；相仿的；类似的；
The effect was similar to that of a mother singing to a baby.
这种效果跟母亲给婴儿唱歌类似。
4. replace A with B 以B取代A；
They replaced the wooden chairs with plastic ones.
他们用塑料椅子来代替木头椅子。
