But building a successful business around it is tough, and so far we've only seen clear-cut examples of commercial success in areas where the product category is mature, even commoditized.

但是围绕开源建立一门成功的生意是困难的，到目前为止我们见到的商业成功都出现在非常成熟的产品类别，甚至已经是达到日用品的程度的。

youdao

Added new building category - Half Walls!

增加了新的建筑类别-半墙！

youdao

Added new building category - Doors!

增加了新的建筑类别-门！

youdao

For example, the CN Tower in Toronto,Canada is not included in the tallest building category because it is a communication tower.

VOA: special.2010.03.31

The GALAXY Note 10.1 extends the GALAXY Note category, building on the success of last year's worldwide hit smartphone - and delivering the functionality and precision of a pen and paper by combining the S Pen with a 10.1-inch large display.

ENGADGET: blogger-avatar

It's the middle category--building new sports venues--that can lead to trouble when demand for their use is limited following the games.

FORBES

Funding in the Scottish Borders town will focus on the Market Place area as well as the category A listed building, Sir Walter Scott's former court house.

BBC: Scottish towns awarded ?10m towards improvement works