That's actually the same formula that we are using for cross products.
这和求外积的那个公式，其实是同一个公式。
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When you find mothers coming back to the website to buy the wipes and the formula they need every week, there is a tremendous opportunity to up-sell and cross-sell other products.
Take the first cross section as an example, and the calculation formula of flexural capacity of composite beams is obtained by using the error transfer formula of mathematical statistics.