Homonym problem was put forward in the course of Chinese reform of a writing system.

同音词问题是在中国文字改革的过程中提出来的。

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So the biggest challenge for American learners of Chinese is definitely the writing system.

对于美国汉语学习者而言，最大的挑战毫无疑问是书写体系。

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So the biggest challenge for American learners of Chinese is definitely the writing system.

对于美国汉语学习者而言，最大的挑战毫无疑问是书写体系。

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