人们不得不与六价铬共存并从源头上管理它。
We have to live with hexavalent chromium and manage it at the source.
致癌的铬：世界上很多地方通过铬把兽皮制成皮革，铬在六价化学结构下是强烈致癌物。
CARCINOGENIC chromium: Turning hides into leather in much of the world requires chromium, which in its hexavalent chemical form is a potent carcinogen.
加利福尼亚提出的健康目标是要将由可能由六价铬引起癌症风险降低到百万分之一。
California's proposed health goal is designed to limit possible cancer risk to just one in a million for those exposed to hexavalent chromium.
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