量入为出liàng rù wéi chū
(1) [base one's expenditure upon one's income;live within income; plan one's expenditure in the light of one's income]∶支出在数量或程度上不超过收入
居家过日子要量入为出
(2) [make ends meet; spend no more than one's income; stretch one's legs according to the coverlet]∶根据收入情况确定支出限度
并用筹策,计较府库,量入为出。——《三国志·卫觊传》
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