B-c
abbr. 公元前（Before Christ）
🗣️ 情景例句
That's good, I thought I was late.
太好了，我还以为我来迟了呢。
Your question is how we developed our product?
你的问题是我们是如何发展我们的产品？
They all went up some narrow steps into a large room.
他们全都登上这些狭窄的台阶，接着进入一个大房间。