When we fill bottles with water from streams and lakes, we deal with the risk of parasites by treating the water with a filter or chemicals, or by boiling it.
英
美
释义
当我们到小溪把溪子里的水装满时,我们用过滤器或是药物来处理寄生虫,或是把水煮开杀死虫子。在户外,我们与熊共处,既要保护我们自己,又要不伤害熊。
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