If everything is optional, the validator will sit idle when, for instance, the product message is missing vital product data.

如果所有的东西都是可选的，那么假设当产品消息中缺少重要的产品数据时，验证器就会停止工作。

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The reason for that is their capability to send a product message across to thousands of people over a short period of time.

原因是自己有能力派遣一个产品讯息传达给成千上万的人在一段短时期。

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The message keys contain a product identifier in the first segment of the key name.

消息键在其名称的第一部分包含了一个产品标识符。

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While these questions represent only some of the questions investors will want to discuss before selecting a new or high yield investment product, the message remains: Ask before you invest.

FORBES: Beware of High Yield Investment Promises

You can more effectively market a product if you tailor your message to fit the motivational focus of the product or the audience you are aiming for.

FORBES: Use Motivational Fit to Market Products and Ideas

He said staff refused to sell him the product after an alert message was displayed on the till.

BBC: Tesco burgers