イーズ イン補間(A kind of animation interpolation that modifies how the property value changes as time approaches the keyframe. A value of 100% would make the property change slow down as time approached the keyframe)
イーズ アウト補間(A kind of animation interpolation that modifies how the property value changes as time moves away from the keyframe. A value of 100% would make the property change start slowly as time left the keyframe)
線状補間(One of three methods used to describe how an animation transitions between values over its duration. This method produces a constant rate of change)