The biocompatible of hydroxyapatite is very well, it is a kind of repair and replacement material of bone.

羟基磷灰石是具有良好生物相容性的骨修复和替代材料。

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Synopsis Cellular concrete has gained popularity as a "Soil replacement material" in many geotechnical applications.

多孔混凝土用作土的代替材料已开始广泛运用在岩土工程中。

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Bioactive ceramic-coated metal has the predominance of both metal and ceramics, so it is considered as a kind of the most promising bone replacement material.

金属基生物活性陶瓷涂层由于具有金属和生物活性陶瓷的综合优势，被认为是目前最有前途的一种承重骨替换材料。

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Rather, replacement components would be generated as needed from feedstock material.

MSN: Future astronauts may rely on made-in-space parts

One specific material he is working on may be suitable as a replacement technology for photovoltaic cells, one that promises to be one-hundredth of the cost of existing solar cells, which can overcome whatever efficiency loss it represents.

FORBES: Intelligent Design Comes To Inorganic Matter

This week's accord could result in little more than a return to a 1994 pact between America and North Korea, by which North Korea froze its operations at Yongbyon in return for fuel oil shipments and an agreement eventually to provide replacement nuclear reactors that could less easily be used to make weapons material.

ECONOMIST: Some cheer over North Korea