把积蓄藏在床垫下面 keep one's savings hidden under one's mattress
A：Maria has kept her life savings hidden under her mattress.
玛丽亚把她一辈子的积蓄都藏在了床垫下面。
B：How do you know that?
你怎么知道的？
savings /?seivi?z/ n. 积蓄，储蓄
hide /ha?d/ v. 藏起来；隐瞒（其过去式是 hid，过去分词是 hidden）
把床垫翻个面 turn over the mattress
A：I turn over my feather mattress monthly, and it feels snug and warm.