单词：high-altitude erythremia
high-altitude erythremia的用法和样例：
例句
- During these journeys he discovered the connection between the Amazon and Orinoco river systems and surmised that altitude sickness was caused by lack of oxygen.旅程中他发现亚马逊河系与奥利诺科河系是相通的，并推测高山病起因于缺氧。
- For many, approaching Tibet gradually by train will be preferable to flying in, as it will allow more time to acclimatise and reduce the chance of altitude sickness.更好的是，与坐飞机相比，乘火车将是逐渐的抵达西藏，这样将使乘客有更多的适应时间和降低发生高山病的几率。
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