（专家提醒说，雾对人体健康的危害有很大的隐蔽性。）据测定，雾滴中各种酸、碱、盐、胺、酚、尘埃、病原微生物等有害物质的比例，比通常的大气水滴高出几十倍。
【正确答案】：Experts caution that the harmful effect of fog on our health is often concealed.
【题目解析】：”专家提醒说“翻译成”experts caution that"; "雾对人体健康的危害“翻译成” the harmful effect of fog on our health'; "有很大的隐蔽性“翻译成”is often concealed".
