Bil
基本脉冲电平（Basis Impulse Level）；基本绝缘电平（Basic Insulation Level ）
🗣️ 情景例句
A construction company. Roads, bridges, big stuff.
一家建筑公司。修路， 筑桥， 都是大工程。
He emerged as leader at the age of thirty.
他在30岁时出人头地成为领袖。
We can do that at the meeting tomorrow.
我们明天开会时再签订吧。