Some other tips, beyond this first step, for controlling impulse spending
除了第一点外，还有些战胜冲动购物的小贴士
The derivative of the step is the impulse .
阶梯的导数就是脉冲。
Whenever I step into a department store I have the impulse to buy things.
每当走进百货公司，我就有购物的冲动。
The derivative of the step is the impulse.
阶梯的导数就是脉冲。
The derivative of the step is the impulse.
阶梯的导数就是脉冲。
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