Very limited information has been reported concerning andesite weathering.
迄今对安山岩之风化过程研究资料之报导仍有限。
In many porphyry copper deposits, additional enrichment of the metal has been caused by surficial weathering.
在许多斑岩铜矿矿床中，地表风化使得金属铜进一步富集。
The results of laboratory accelerated weathering test and laser raman spectroscopy test show that, the property of ageing resistance and recoatability has greatfully been improved.
研究结果表明，改性后的纳米复合防护剂的耐老化性能以及重涂性能都有很明显的提高。
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