Nonlead
a. 无铅的[汽油等]
🗣️ 情景例句
Where did you receive your master degree?
你在哪里获得硕士学位的？
I'm reading a book.
我在看书。
Fred Pearson was walking through the university town of Oxford one morning in 1961.
1961年的某个早上，弗雷德·皮尔逊正步行通过牛津大学城。