常見(jiàn)例句He amassed a fortune from silver mining.他靠開(kāi)採(cǎi)銀鑛積累了一筆財(cái)富。The mine once had a rich vein of silver, but it petered out.這鑛牀原有很豐富的銀鑛，但已所賸無(wú)幾了。 返回 silver mine