When baby is lying on his front, hold something so that he has to raise his head to see it.
当宝宝趴着时，抓一样东西逗他，这样他就得抬起头来才能看到。
Raise arms up to shoulder level together in front of the body (see Photo B).
双臂一起向身体前方上举至肩膀水平（见图B）。
You can lie on your front and raise your head to curve your spine.
你可以面朝下趴着，然后抬头，使你的脊柱弯曲。
You can lie on your front and raise your head to curve your spine.
你可以面朝下趴着，然后抬头，使你的脊柱弯曲。
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