When you compute an integral in single variable calculus, you don't do that. You don't cut into little pieces and sum the pieces together.
当计算一个单变量的积分时，你不会这样做的，不会分割出一个个小块，再对这些小块求和。
When you compute an integral in single variable calculus, you don't do that. You don't cut into little pieces and sum the pieces together.
当计算一个单变量的积分时，你不会这样做的，不会分割出一个个小块，再对这些小块求和。
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