Problem formulation
[计] 问题公式化
🧩 词语组成解析
🗣️ 情景例句
Do you get the message?
明白我的意思没有？
Thank you very much.
非常感谢大家。
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。