The task varied in difficulty according to the pitch of the second tone.
这项任务的难度随着第二个音调的高低而变化。
The second part: Compare the tone adverbs in the two books.
第二部分：将两部专书进行比较。
The second part is the experimental analysis of Pakistan students acquiring single word tone.
第二部分，巴基斯坦留学生单字调的实验分析。
The tones include the first, second, third, and the fourth tones and the neutral tone.
声调包括第一、第二、第三、第四声和轻声。
The tones include the first, second, third, and the fourth tones and the neutral tone.
声调包括第一、第二、第三、第四声和轻声。
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