Otc
abbr. 技术合作处（Office of Technical Cooperation）
🗣️ 情景例句
I have to meet my wife.
我得去接我太太。
That was a close call.
太危险了。
it would be up and down, to and for and from side to side.
呈现出上上下下、来来回回、左左右右3种性质的运动。