Gas-phase oxidation treatment resulted in distrihution of some micro-pores and ditches at the carbon fiber surface and led to stress concentration therefore, the composite strength was not high.

结果表明：空气氧化处理碳纤维表面形成微孔和刻蚀沟槽，容易形成应力集中，复合材料的强度不高；

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Whereas plastic composite materials can also provide great strength and lightness, they can be difficult if not impossible to recycle.

虽然塑料复合材料也能提供高强度，轻巧的部件，但塑料复合材料几乎很难回收利用。

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Grasshopper is a foldable electric bicycle that turns into a trolley for easy transport. The use of composite materials provides rigidity and strength.

蚱蜢自行车是一种可折叠的电动自行车，它可以被折叠成手推车形，便于携带。复合材料的使用，保证了其硬度和强度。

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Asian markets were mostly higher, led by a 1.4% jump in China's Shanghai Composite, as strength in brokerage stocks helped lift the index off fresh 2013 lows hit in the previous session.

WSJ: Dow Touches 15000 on Jobs Data

The armor's strength is derived from a reptilian arrangement of overlapping ceramic and titanium composite discs, which simultaneously block incoming rounds and dissipate the impact to a wider area.

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