Split the working area by warning card before starting work, to avoid damage caused by entrance of passersby.

用警示牌将工作区域分隔起来，以防过路者闯入造成损伤。

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The Chief Steward has the authority to issue a yellow warning card for abuse to horses and incorrect behavior towards officials.

马术监事长有权利对于咒骂马匹和对官员们行为不当的选手出示黄牌警告。

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If the Academic Assistants (AA) must talk to students about poor behavior, the 1st time they will get a verbal warning and the 2nd time they get written warning card.

学员凡在就读期间每得到一次口头或书面警告的，教务部门都会找学员谈话。

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Or it knows you are a compulsive shopper: it can flash a warning on your credit card balance as you consider another purchase.

CNN: The wave of wearable computers

The paranoid fringe has been warning since the Visa card was introduced in the 1950s that it provides big business with a chilling way to snoop on our most intimate shopping habits.

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In soccer, a yellow card is given as a warning to a player for an egregious violation of the rules.

NPR: Soccer Referee Punched By Player In Utah Dies