于此同时，我们的直立姿势使得气管和食管出于一个近乎垂直的位置。
Simultaneously, our upright posture put the trachea and esophagus in a near-vertical orientation.
因此这些发现告诉我们感知运动对我们的直立姿势是关键。
These findings therefore show that sensing movement is crucial for our upright posture.
当鱼鳔膨胀时，会增加天然浮力助，帮助鱼类在水中保持直立姿势。
When inflated, the bladder serves as a natural buoyancy aid, keeping the fish upright in the water.
当鱼鳔膨胀时，会增加天然浮力助，帮助鱼类在水中保持直立姿势。
When inflated, the bladder serves as a natural buoyancy aid, keeping the fish upright in the water.
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