That's not an overstatement. As I said, these are only the main ones. There are many others.
你这样说一点也不夸张,我只是说了几个重要的节日,还有很多没有提及呢。
Those planning a trip to remote areas, or intending to live in countries where drinking water is not readily available, should know about the various possible methods for making water safe.
那些计划去偏远地区旅行,或在饮用水不现成的国家居住的人,应该知道如何使水适于饮用的各种办法。