Here, the upper airway collapses at irregular intervals during sleep, possibly due to a lack of muscle tone in the throat lining, which triggers snoring.
在这种情况下，上呼吸道可能会因为喉衬缺少肌肉张力而在人们的睡眠中会不规律的塌陷，造成打鼾。
The use of lightweight zinc cladding gives the upper storey a muted tone, texture and colour that subtly merges with the surrounding environment.
使用轻量的锌覆盖层为上层的楼层提供了柔和的色调、质地和颜色，使之巧妙地融入周围环境中。
The shoes' shape is a black upper with green colour around the ankle area and tone area.
这双鞋是一只黑色的形状上与绿色的色彩在脚腕区域和色调的区域。
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