Baur
n. biologically active ultraviolet radiation 具有生物活性的紫外辐射
🗣️ 情景例句
Tell me about your educational background.
告诉我你的学习背景。
How did you recognize him?
你是如何认识他的？
The long hours in the office or the factory bring with them as their reward,
在办公室或工厂里长时间的工作给他们带来了酬劳，