四、母语为中文者（native Chinese speakers）与母语为美语者（native speakers of American English）对不同请求情境之负担程度（degree of imposition）的认 知是否有差异？
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In the early stages of learning Chinese, tones represent one of the biggest problems with non native Chinese speakers.
在初期阶段的学习中文，铃声代表了其中最大的问题，与非本土中文发言。
The Yu Ying charter school has recruited five native Chinese speakers living in the United States to teach their classes. More photos.
育英特许学校招募了5名住在美国的汉语母语者教授中文。
Some city elementary schools, such as PS 310 in Sunset Park, Brooklyn, have launched Chinese bilingual programs aimed at native Chinese speakers.
布鲁克林森赛特公园的“PS 310”小学等一些学校，还推出了中英双语教学计划，面向的是母语是汉语的华人。
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