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
Have you had dinner yet?
你吃晚饭了吗？
Who undertakes many things at once, seldom does anything well.
许多事情同时干，一件事也办不成。
Sorry I am late. The car broke down.
抱歉我晚了，车坏了。