Even with this success, people continued to worry that video on demand was going to torpedo the rental business.

就算这样成功了，人们还是担心视频租赁业务只要一经变故就彻底完蛋。

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Their owners worry that the plans will demand expensive train-control technology that freight traffic could do without. They fear a reduction in the capacity available to freight.

铁路业主担心需用昂贵的费用引进货运铁路用不到的“列车自动控制技术”，并担忧现有的货运能力会因此而下降。

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Some bulb makers worry about keeping up with demand for fluorescents if incandescents are phased out quickly.

一些灯泡制造商担心如果白炽灯被很快淘汰，将无法满足萤光灯的需求。

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One worry is that demand creates supply.

ECONOMIST: International adoption

Farmers also worry about uncertain market demand, pointing to the big surplus that developed in 2001.

ECONOMIST: Ethically minded shoppers turn their focus to cotton

But that was much slower than at the start of 2007, and the worry now is that demand from Europe has started to flag.

ECONOMIST: Decoupling 1: Emerging Asia