The long-run trend for rural labor transfer is independent of learning barriers.

转移过程的长期趋势与学习障碍无关。

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However, many students have been terrified by the sight of mathematics and got very low marks for a long time. This finally led to the formation of math learning barriers.

但是长期以来，很多中专生对数学望而生畏，成绩低下，久而久之就形成了数学学习障碍。

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The flexibility and relative affordability of phones allows for easy distribution and use, providing distance learning across geographical barriers.

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Available to employees on-demand as well as via mobile devices and tablets, online learning communities remove barriers dear to the hearts of brick-and-mortar universities and companies.

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Sometimes, however, we have internal barriers to learning and achievement that keep us from growing intellectually and professionally.

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