在《人类环境杂志》上发表的一项研究称，科学家们发现，自引进无铅汽油以来，美国东北部土壤中的铅含量已经显著下降。
In a study published in the journal Ambio, scientists found that lead levels in soil in the North-eastern United States had decreased markedly since the introduction of unleaded gasoline.
事实上，周末我去餐馆吃中饭，点了鲈鱼，他们问我，是喜欢普通的还是无铅的。
In fact, when I went to lunch this weekend and ordered the sea bass, they asked if I wanted it regular or unleaded.
铼可以用来制造喷气式发动机的耐高温合金部件，也是高能量的无铅汽油的成分。
Rhenium is used to make high-temperature alloys for jet engine parts and in high-octane, lead-free gasoline.
应用推荐