It's looking at the i'th and the i plus first element and it's saying, gee, if the i'th element is bigger than the i'th plus first element, what's the next set of three things doing?

他在观察第i个元素,和第i+1个元素,如果第i个元素大于第i+1个元素，接下来的要做哪三件事情？

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