A new polymer material that can repeatedly heal itself at room temperature when exposed to ultraviolet light presents the tantalizing possibility of products that can repair themselves when damaged.

一种新的聚合物材料在室温紫外光照射下可以不断地进行自我恢复，这一特性表示日后的产品在受损后也可以自我修复。

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Toward interior, language of edges will be exposed in the whole work synthesizing the construction system and material variation thereof is reinforced.

对于室内，屋体边沿的设计语言将会暴露整个施工综合建造系统和材料的变化，因此它经过加固。

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It is the country's first steel-industry merger since 2002, and comes as rising raw-material prices and steely competition from other East Asian producers have exposed alarming over-capacity.

这是日本钢材业自2002年以来的首次合并，时逢原材料价格不断上涨，东亚钢材生产厂商对日本钢材业的冲击日益加强，已经暴露出钢材业产能过剩令人担忧的状况。

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The exterior is completely metal and the only other exposed material on the outside is concrete.

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"Ending the exemptions from age classification for hard copy music videos will be an important step forward in making sure that children are not inadvertently exposed to unsuitable material, " said Mr Bailey.

BBC: Age-ratings call for music DVDs

The material is exposed to ultraviolet light through a mask patterned with the outlines of cells.

ECONOMIST: REPORTS