Well, the researchers cited a marketing campaign designed to reverse the sales decline of carrots.

研究人员引用了一项旨在扭转胡萝卜销量下滑的营销活动。

But following the launch of a rival's new smartphone, sales declined steadily.

但随后，竞争对手推出了新的智能手机，我们公司的销售额逐步下降。

The snag is that the industry has yet to find a way to replace declining album sales.

还有一个小问题就是，尽管唱片销售额在不断下滑，但是业界仍未找到可以替代传统音乐销售的方式。

And global smartphone sales declined last year for the first time since 2009.

去年全球智能手机销量自 2009 年以来首次出现下滑。