美国住宅建筑业协会(NAHB)的一项研究发现近90%的建筑师都在采用绿色设计，具环保意识的新住宅在2005年增长了20%。

A study by the National Association of home builders (NAHB) found that some 90% of home-builders are now using green ideas.

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该协会代表还表示，检验儿童感冒药安全性的研究设计起来有难度，招募实验对象也有难度。

Representatives of the industry group also said it can be challenging to design, and enroll participants for, studies testing medicines for children's colds.

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最近，在美国科技进步协会的华盛顿年会上，研究者们展示了“双足机器人”的设计方案。

At the recent AAAS (American Association for the Advancement of Science) annual meeting in Washington DC, researchers showed off bipedal designs.

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