求翻译：砷(As)是一种有毒并致畸致癌的化学元素[1, 2]，以主要或伴生元素存在于多种硫化矿物或部分煤炭之中，矿山开采、冶炼、煤炭燃烧等人类活动使矿石中As进入地表环境，带来严重污染[3]。我国集中了世界探明As储量的70%，而现有技术水平下全国平均约70%的As采出后存在于选矿尾砂中[4]。是什么意思？

Arsenic (as) is a toxic and carcinogenic teratogenic chemical elements [1, 2], or associated with the main elements of a variety of sulphide minerals present in coal or in part, among the mining, smelting, coal burning and other human activities as the ore into the surface environment, lead to serio

Arsenic (As) which is a toxic and carcinogenic substances, the teratogenic intergalactic [1, 2] in order to main or associated elements exist in multiple sulphide mineral or part of coal mining and smelleding, mining, coal combustion As human activities such as in the ore into surface environment, c

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Arsenic (As) is a toxic and teratogenic carcinogenic chemical elements [1, 2], primary or associated elements exist in a variety of sulfide minerals, or some coal, human activities such as mining, smelting, coal combustion in the ore As entering the surface environment, serious pollution [3]. Our co