Current time between 0 and the duration (inclusive).
The initial value of the animated property.
The total change in the animated property.
The duration of the motion.
Additional arguments.
Ease function is a function that takes a time parameter and returns a value between 0 and 1.
Ease函数是一个接受时间参数并返回0到1之间值的函数。
Current time between 0 and the duration (inclusive).