二甲砷基

例句：

1. 1. The worker was exposed to high levels of arsenic in the workplace.
   这名工人在工作场所暴露于高浓度的砷。
2. 2. Arsenic is a highly toxic substance that can cause serious health problems.
   砷是一种高度有毒的物质，可能导致严重的健康问题。
3. 3. The government has been working to reduce the levels of arsenic in the environment.
   政府一直在努力降低环境中的砷含量。