And occasional surprise counts of the fund should be made to prevent careless handling, theft, and misuse of petty cash fund.

对零用现金要不时地进行突击性盘点，以防止对零用现金管理粗心，盗窃和滥用现象的发生。

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Contract theory formalises the common sense that excess payments help prevent careless driving, which insurance companies cannot perfectly monitor.

契约理论正式确立了这种常识：自掏腰包的额外费用有助于阻止粗心驾驶，而后者是保险公司无法完美监测的。

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So I told him to come up with a system that would prevent such careless mistakes.

于是，我让他想出一个办法，以防止再犯下这种粗心的错误。

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