Nonleaded
a. 无铅（如汽油等）的
🗣️ 情景例句
A list of these items and a volunteer form
这些物品的清单和义工申请表格
Open your book,please.
请把书打开。
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。