he has difficulty learning mathematics
...这时的变化真的很大 » When the changes are really very big 他在学数学方面有困难 » He has difficulty learning mathematics 所有国家都不同意攻击带有红十字标志的任何东西 » All countries do not agree with attacks and Red Cross symbol in anything ...
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he has difficulty learning mathematics
他学数学有困难
以上为机器翻译结果，长、整句建议使用 人工翻译 。