How long have you had your Apple iPhone or computer? If you have not replaced that product in the last two or three years, you may be part of the reason for Apple's falling sales numbers.

    Apple is the world's most valuable company. Its yearly growth trend started in the early 2000s, with exciting new computers and a portable music player known as the iPod.

    The company continued to grow, with the introduction of the iPhone smartphone. Then, it introduced the iPad tablet.

    Sales of Apple products grew every year for 51 straight quarters. That all changed on Tuesday, when the company reported a drop in sales. Sales for the first quarter of 2016 dropped 13 percent.

    Sales dropped to $50.6 billion from $58 billion during the same quarter in 2015.

    The news caused Apple's stock to drop, too. The company's shares were down by about 8 percent in after-hours trading.

    Slow growth in China

    Some experts say the struggling Chinese economy may be to blame for Apple's weaker sales. The company's report shows sales were down in China, Taiwan and Hong Kong by a combined 26 percent. In the past, Apple was able to depend on sales growth in those markets.

    Apple's Chief Executive, Tim Cook, says the smartphone market is not growing because of the slowing economies in some countries.
    苹果首席执行官蒂姆·库克(Tim Cook)表示,由于一些国家经济放缓,智能手机市场未能取得增长。

    But other experts say Apple is no longer regularly producing exciting products. People who bought new Apple laptops or smartphones in the last two or three years do not feel like they need to buy the latest products.

    Rob Pegoraro is a technology writer for USA Today and Yahoo. He says he still likes to use the Apple products he owns but, there is nothing "revolutionary" right now.
    罗布·佩戈拉罗(Rob Pegoraro)是今日美国和雅虎网站的一位科技写手。他说自己还是喜欢使用他所拥有的苹果产品,但是现在苹果公司没有什么重大革新的产品。

    "You got a lot of people upgrading to the iPhone 6 and the iPhone 6 plus. The 6s and the 6s Plus, they're better, but as the names would suggest, they're not exactly revolutionary. Normal people don't buy new phones every year. "
    “很多人升级到了iPhone6和iPhone 6 plus。6s和6s Plus更好,但是正如它们的名字所暗示的,它们不是确切的重大革新。普通人不会每年都买手机。”

    Apple still makes a lot of money

    Pegoraro also says that Apple did not really have a bad quarter. The company still makes a lot of money from the products it sells. It is just not growing anymore.

    "Their gross margin was 39.4 percent compared to 40.8 percent. I struggle to think of how many other industries or companies could pull down those kind of profit margins for over a decade straight."

    Pegoraro says there is not much more room for improvement in the products Apple makes. For example, the company could create an iPhone with a battery that lasts five days. "That would be amazing, but you're running into the laws of physics there," Pegoraro says.

    The Associated Press news agency reports that there are still parts of Apple's business that are growing. For example, there are 500 million iPhones in use. Those phones need cloud storage, apps and music. That part of the company is worth $6 billion per quarter now, and that is an increase of 20 percent over the same period last year.

    There are also concerns that the Apple Watch, which came out a year ago, did not have better sales. But the watch actually sold more than twice as many units in its first year compared to the first iPhone in 2007.
    还有人担心一年前推出的Apple Watch销量不佳。但是和2007年第一代iPhone相比,Apple Watch第一年的实际销量是它的两倍以上。

    Right now people can only guess what is next for Apple. Some think the company will make an electric car. It is building a new headquarters that has been described as a spaceship or flying saucer by some observers.

    Pegoraro warns to not underestimate Apple just because of this small drop in sales.

    "This company, their problem is they made a lot of money, just not more money than they made the last quarter. You know, if that's failure, then I should only hope to be just as much of a disaster!"

    I'm Dan Friedell.