All the different trigger types can be used independently or in conjunction with each other to build more elaborate instructions.

所有不同类型的触发器都能够单独使用，也可彼此组合，构建更加精准、完善的指令。

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For instance, it uses U.S. Postal Service data to determine when someone has moved--a "trigger event" that may mean a consumer is in the market for certain types of items, such as kitchenware.

FORBES: Consumer Spy