Bil
基本脉冲电平（Basis Impulse Level）；基本绝缘电平（Basic Insulation Level ）
🗣️ 情景例句
Are you married or single?
你结婚了还是单身？
We are really glad to see you so constructive in helping settle the problems as regards the signing of the contract.
我们很高兴您在解决有关合同的问题上如此具有建设性。
What about wrestling and sailing?
摔跤和帆船怎么样？