求翻译：　While traveling around with a busy sightseeing schedule, tourists may suffer from different kind of illnesses. They may get too tired or have heat-stroke if the weather is too hot. They may get hurt in certain activities such as bungee jumping and mountain climbing. Some tourists may have skin problems caused by certain kinds of plants, insects, or from eating seafood. Other tourists may have stomach trouble if they are not acclimatized to local water and food. Air-sickness, car-sickness or sea-sickness is also a problem for some travelers.是什么意思？

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