Obc
abbr. outer back cover 封底; on board checkout 在板校验; oscillating Baffle column 振动挡板柱（塔）; old brutal convict 时间长而令人痛苦的肺病
🗣️ 情景例句
No.
不是。
I agree. I wish they were simpler.
我觉得也是，希望能简单些。
Could you explain exactly what you do?
您能确切的解释一下你做些什么吗？