另一些人，他们在处理数学问题上存在障碍，则可能患有计算困难。
Someone who has trouble with mathematics may have dyscalculia.
他数学考试不及格是他前途上的一大障碍。
Not be able to pass his mathematics exam proved an obstacle to his career.
他数学考试不及格是他前途上的一大障碍。
Not being able to pass his mathematics exam proved an obstacle to his career.
他数学考试不及格是他前途上的一大障碍。
Not being able to pass his mathematics exam proved an obstacle to his career.
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