Nonlead
a. 无铅的[汽油等]
🗣️ 情景例句
Can you finish the work by five o'clock tomorrow?
你能在明天五点钟之前做完这项工作吗？
Have you taken a train?
你坐过火车吗？
How did you find the talk this morning?
你觉得今天早晨的报告怎么样？