1It is more difficult for me to learn English than Maths
2As for me, learning English is more difficult than Maths
3Learning English is more difficult than Maths.
个人推荐第一种,做翻译力求忠实原文,故不主张略去learn,也不主张改变原句的句型,即原句不是分句构成,而是一个整体的句子,1,3,好一些,仅供参考
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