tighten our purse strings的用法和樣例：
例句
用作不及物動(dòng)詞 (vi.)
- Ma Gang expresses, these products save the Euramerican user that is purse shrink expenditure, make they won't decrease because of income and get the menace of trojan virus.
馬剛表示，這些產(chǎn)品將為錢(qián)包縮水的歐美用戶(hù)節省開(kāi)支，使他們不會(huì )因為收入減少而受到木馬病毒的威脅。
