Ietf
[计] Internet工程任务组
🗣️ 情景例句
Would you like something to eat?
来吃点东西， 好吗？
Is that so?
是这样子的吗？
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。