mount up phrasal verbphr v INCREASE IN NUMBER OR AMOUNTto gradually increase in amount 〔数量〕逐渐增加 At £6 a ticket, the cost quickly mounts up. 每张票六英镑,费用一下子就增多了。
mount up• She finally had to go back to work to pay the bills that were mounting up.• The national debt has mounted up, growing to $1 trillion since Clinton took office.
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