汉语普通话双音节词语具有轻重格式。
结果显示，对外国人而言双音节声调组合的难度存在差异。
The results suggest that certain tone combinations are more difficult for learners than others.
结果显示，对外国人而言双音节声调组合的难度存在差异。
The results suggest that certain tone combinations are more difficult for learners than others.
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