问题描述：
We know 1/3 of all the pines are 30 more than 1/10 of all the poplars翻译
We know 1/3 of all the pines are 30 more than 1/10 of all the poplars,1/3是指三分之一
We know 1/3 of all the pines are 30 more than 1/10 of all the poplars,1/3是指三分之一
问题解答：
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