Bil
基本脉冲电平（Basis Impulse Level）；基本绝缘电平（Basic Insulation Level ）
🗣️ 情景例句
Alexandra's coming over to help me
Alexandra就要来帮我
You'd better go at once, hadn't you?
你最好马上走，不对吗？
Good idea! When shall we meet?
好主意！我们什么时候会面？