It's not reliable to judge a product only by its appearance.

单凭外观来判断一个产品是不可靠的。

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"I purchased what I thought was a top-of-the-line product only to be terribly disappointed," one user wrote Tuesday. "This is my first iPhone and may well be my last."

“我曾认为自己购买的是一款高品质的产品，但现在我完全失望了，”这周二，一位用户这样写道，“这是我第一台iPhone，也会是最后一台。”

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Whatever product you use should emit only visible light, because ultraviolet light damages the eyes.

不管你用什么产品，都应该只发出可见光，因为紫外线会伤害眼睛。

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Oil became a useful product only in the middle of the eighteen hundreds.

VOA: special.2010.02.25

A product like Windows is in a sense only as good as it's last release or two.

如“视窗“一样的产品不过是,和它之前推出的如出一辙而已。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

We'll assume that each consumer buys one and only one product.

我们假设每个消费着买且只买一个产品

耶鲁公开课 - 博弈论课程节选

Gillette, boasts Al Zeien, the company's 68-year-old chairman, launches a new product only when it has made a genuine technical advance.

ECONOMIST: Gillette

But just like your electric power company, you can sell your product only at a price acceptable to Canada's minister of health.

FORBES: Gouging The Drug Companies

That takes time to happen many still see Microsoft as an operating system and one product only company but it can be powerful when it does happen.

FORBES: After Earnings, What Can Apple Do Next?