And, I'm going to have to explain to you, where does it come from? OK, but before I do that, well, let me point out actually that the equation is not just the diffusion equation.

给你们解释一下，这个从哪儿来？，在我解释之前，告诉大家，这个方程不只是扩散方程。

youdao

Diffusion is when you have a fluid in which you are introducing some substance, and you want to figure out how that thing is going to spread out, the technical term is diffuse, into the ambient fluid.

扩散就是，当在某液体中加入某物质时，想算出该物质怎样在周围的液体中散开，专业术语叫做扩散。

youdao

At the same time, carbon dioxide is removed from the blood through the same process of diffusion. This waste gas is expelled as we breathe out.

同时，血液中的二氧化碳经过同一个扩散过程被排除，并随着我们的呼气而排出体外。

youdao

Wearing a navy and black A-line mid-thigh sleeveless dress with a modest collar, ultra-high Christian Louboutin platform pumps and a tight ponytail, Beckham begins the interview by pointing out that her Victoria, Victoria Beckham line is not a diffusion label.

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