Listen to a chant first, present "Summer holiday", then sing it together.
先听一段说说唱唱，呈现“暑假”，然后一起唱这首歌曲。
This implies that the saturation processes are present in summer rather than in winter.
这意味着饱和过程存在于夏季而不是冬季。
This implies that the saturation processes are present in summer rather than in winter.
这意味着饱和过程存在于夏季而不是冬季。
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