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The structural building blocks in these materials which are incorporated into the matrix are predominantly inorganic in nature and show a size range from the lower micrometer to the millimeter range and therefore their heterogeneous composition is quite often visible to the eye. ÆäÖС°building blocks¡±ÈçºÎ·Ò룿 ÎÒ½«ÆäÒëΪ¡°¹¹Ô첿¼þ¡±£¬»¹ÓÐËÖªµÀ¸üºÃµÄ£¿ [ Last edited by wizardfox on 2008-11-27 at 12:39 ] |
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biology-jlu
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3Â¥2008-11-27 09:22:10














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