Her mom had often told Mary the bad result of being so careless.
她的妈妈经常告诉玛丽，这么粗心会有什么后果。
Answer: Muscle cramps are often the result of dehydration, so it's important that you make sure you're hydrating properly before, during, and after your runs.
回答：肌肉痉挛通常是由于脱水造成的，所以在跑步之前、之中和之后都要保证适当补充水分。
Certain immediate effects are similar to those from colds or other viral diseases, so it is often difficult to determine if the symptoms are a result of exposure to indoor air pollution.
有些即时反应与感冒或其他病毒感染疾病的症状相似，所以经常很难确定这些症状的罪魁祸首是不是室内空气污染。
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