But if a lowlander stays in this high-altitude environment for too long, the adaptation starts to turn against his or her health.
但如果一个低地居民在高海拔环境呆太久，他们身体所作出的适应性调整便会妨碍他们的健康。
A lowlander exposed to the low oxygen concentrations of high elevations can quickly fall victim to altitude sickness, whose symptoms include nausea, dizziness, and fatigue.
生活于平地的人一旦暴露在高海拔环境中，因为缺氧立即会出现高原反应：恶心，眩晕及乏力。
A lowlander exposed to the low oxygen concentrations of high elevations can quickly fall victim to altitude sickness, whose symptoms include nausea, dizziness, and fatigue.
生活于平地的人一旦暴露在高海拔环境中，因为缺氧立即会出现高原反应：恶心，眩晕及乏力。
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