Tomatoes aren't a staple of the Chinese diet -- industry figures show consumption of just 0.6 kilograms per person, compared with 25 kilograms in the U.

番茄并非中国人的主要食品，产业数据显示中国的人均番茄消费量尽为0.6公斤；

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Civil servants,who earn about 100 U.S.dollars a month, can buy staple foods.

VOA: standard.2009.09.15

The notion of creating giant specialty stores that cater to a particular product segment has become a staple of the U.S. economy.

FORBES: Wal-Mart's Next Victims

But an urge to dig ever deeper into your wallet, dear tax-payer, has become a staple on the drawing boards of U.N. plan-o-crats.

FORBES: Keep An Eye On The U.N.

In the U.S. decades of market dominance have made Coke a low-growth staple: The ten-year compound annual unit-case growth in the U.S. is only 4%.

FORBES: The Red Empire