The brain hemispheres take turns sinking into the sleep stage characterized by slow brain waves.
大脑半球轮流进入以慢脑波为特征的睡眠阶段。
Lightly press legs together to increase glide and slow legs from sinking.
轻压腿，增加滑翔和缓慢的腿下沉。
These are coastal cities, all, thus subject to inundation from the sea or slow draining rivers due to scarce difference in sea level elevation, all signs of sinking.
这些全都是沿海城市，因此会由于海拔的稍稍变化而遭受到来自于海洋的洪水和河流排水缓慢，这都是下沉的迹象。
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