Upward curve flattening- slowing down, Horizontal line below zero- negative position, stationary, Downward straight line- constant negative velocity, Horizontal line above zero- stationary, Downward curve- speeding up in negative direction, Upward curve- speeding up, Upward straight line- constant positive velocity.

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?