Only in parts of Southern California has it peaked in popularity.

只有在南加州地区“有流行的高峰期。”

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As water tables have fallen and irrigation wells have gone dry, China's wheat crop, the world's largest, has declined by 8% since it peaked at 123 million tons in 1997.

由于地下水位下降，灌溉井干涸，居于世界之首的中国小麦产量，已经从1997年1.23亿吨的峰值下降了8%。

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It is clear by now that the latest wave of technology, which started in early 2003, has peaked.

现在您也应该很清楚鸟，上一波科技大潮，起始于2003年初，现在已经达到了顶轰（峰）。

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Is Facebook forging relentlessly onwards towards world domination - or has it peaked, a social network that appeals more to silver surfers than young digital natives?

BBC: Is Facebook still making friends?

Today, Apple is trading at 8.2x FY 2012 earnings (less cash) because investors are concerned that it has peaked in terms of market capitalization and that there are no new investors to come into the stock.

FORBES: Implications of Black Friday: Apple, Amazon, Ebay

Critics of Apple say that the company has run out of investment opportunities, while the smartphone and tablet market it dominates has peaked, and is seeing tougher competition from the likes of Korea's Samsung and China's Huawei.

BBC: Tim Cook