"上廉"是个多义词，它可以指上廉（经络理论）,上廉（中医基础术语）,上廉（经穴名）。
在边境以南，加拿大以供应网上廉价药物而闻名。
South of the border, Canada is renowned as a source of cheap drugs on the internet.
和在电视上廉价出售你卡车的产品有一点点不同。
It's a little different than selling TVs off the back of your truck.
风一向多变，因此它永远比不上廉价又脏兮兮的煤，后者产出了美国半数电力。
Wind is inherently variable, so it can never compete with the cheap and dirty coal that generates half of America's electricity.
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