And that's potential energy that goes into the spring.
这是存进弹簧的能量。
That was the potential energy of the spring that was converted into kinetic energy.
这是弹簧储存的能量，它转化为动能。
It is merely a transformation of potential energy into energy of motion.
这仅仅是位能转换为动能而已。
It is merely a transformation of potential energy into energy of motion.
这仅仅是位能转换为动能而已。
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