别在那里磨蹭了，我们该出发了。

Stop ___diddling around, it's time for us to leave.

那个小贩通过给顾客缺斤少两来骗钱。

The street vendor was ___diddling customers by giving them short measures.

那个店员被抓住在篡改收据上的金额。

The clerk was caught ___fiddling with the amounts on the receipts.