阿科说20%的西岸司机要含铅汽油。
在二十世纪六七十年代,铅沉积就在土壤和雪中不断累积,这主要是美国的含铅汽油排放的后果。
Lead deposits, which accumulated in soil and snow during the 1960s and '70s, were primarily the result of leaded gasoline emissions originating in the United States.
征收含铅汽油税是实行汽油无铅化的一项重要政策。
Levying a tax on leaded gasoline is an important policy to implement the use of unleaded gasoline.
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