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
It was a gradual process, involving many factors.
这是个渐进的过程，涉及到方方面面。
I approve.
赞成！
the only sound that could be heard was made by water which dripped continuously from the high dome above them.
唯一的可以听见的声响是高高的圆顶上不间断地滴水的嘀嗒声。