随着这种新的习惯科学出现，这些策略被用于销售问题美容霜或不健康食品时引发了争议。

As this new science of habit has emerged, controversies have erupted when the tactics have been used to sell questionable beauty creams or unhealthy foods.

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所以，营销的挑战是销售问题。

And so the marketing challenge is to sell the problem.

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和县的茶产业协会合作，解决销售问题。

Cooperation with the county association of tea industry for marketing.

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Looks like a good idea to me, but she says, we're having a lot of trouble selling it.

这在我看来是个绝好的主意,但她说,她们的保险销售遇到很多问题

耶鲁公开课 - 金融市场课程节选

So I help check people in the class, answer their membership questions, sell memberships, all of that, and

我负责帮助核对上课人数，回答会员问题，销售会籍等，

上东区的瑜伽老师 - SpeakingMax英语口语达人