If you are at a desk all day, it is good to sit on one of these balls for an hour or so, as it puts your spine into the correct curve.
如果在桌子前坐了一整天，像这样在球上坐一小时左右，使脊柱得到正常弯曲，是非常有好处的。
If you are at a desk all day, it is good to sit on one of these balls for an hour or so, as it puts your spine into the correct curve.
如果在桌子前坐了一整天，像这样在球上坐一小时左右，使脊柱得到正常弯曲，是非常有好处的。
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