Understanding head control is important.

认识到头部控制是非常重要的。

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Head control is also becoming well-established at 2 months.

在2个月的时候，头部控制能力也开始很好地建立。

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Head control is also becoming well-established at 2 months.

在2个月的时候，头部控制能力也开始很好地建立。

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