我们可以把西部平原上覆盖的大片草地撕开，然后把有毒的化学物质倒入土壤中，直到土壤枯死，被风吹走。
We can tear apart the great grass cover of the western plains and pour toxic chemicals into the soil until the soil is dead and blows away in the wind.
放焰火会散落大量有毒的化学物质。
我们并没有从事危险的机械操作，或接触有毒的化学物质。
We don't operate dangerous machinery, or get exposed to toxic chemicals.
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