常見例句雙語(yǔ)例句The upper member of the Lujiaping Formation is mainly dark slate, light gray-green (after weathering) sericitized slate, and silt slate.上段以黑灰色（風(fēng)化后為淺灰色）含硅炭板巖和泥灰質(zhì)含炭板巖為主。 返回 light slate gray