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。
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.
“你们好！”水鼠愉快地说，“你们俩从哪儿来？在雪地里迷路了吧，我猜？”
'Hello! 'said the Rat pleasantly. 'Where did you two come from? Lost your way in the snow, I suppose?'
于是富翁把两个儿子找来。艾子问：“你们说大米从哪儿来的？”
The father called his two sons before Ai Zi, who asked the question, "Do you know where rice comes from?""
于是富翁把两个儿子找来。艾子问：“你们说大米从哪儿来的？”
The father called his two sons before Ai Zi, who asked the question, "Do you know where rice comes from?""
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