报告称有些地区一年有200天是烟雾天气。
Some areas reportedly were shrouded in smog for 200 days during the year.
光学厚度小于0.1意味着是能见度高的晴天；1或者以上则意味着烟雾天气。
An optical thickness of less than 0.1 indicates a clear sky with maximum visibility; a value of 1 or above indicates very hazy conditions.
对于因严重暴露在烟雾天气中而造成的死亡情况，短期研究所得的结果含混不清。
But short - term studies of death from acute exposure on smoggy days have yielded mixed results.
炎热的天气使汽车尾气变成烟雾，加剧了空气污染，这可能使患有哮喘和其他有呼吸问题的人的生活更加痛苦。
Hot weather worsens air pollution by turning car exhaust into smog, which can make life miserable for people with asthma and other breathing problems.
一旦与挥发性有机化合物结合，氮氧化合物就会在低压闷热天气造成烟雾或地面臭氧污染——导致人类呼吸系统问题。
When combined with volatile organic compounds, NOx can create smog or ground-level ozone pollution in hot stagnant weather - causing respiratory problems in humans.
十月明蓝色的天气——海伦·亨特·杰克逊；蓝色的火焰；吸烟发出的蓝色烟雾。
October's bright blue weather - Helen Hunt Jackson; a blue flame; blue haze of tobacco smoke.
城市里的天空往往是浓烟密布，空气令人窒息，尤其是在傍晚，因天气冷，烟雾迅速蔓延开来。
Often the sky is covered by large clouds of smoke from chimneys. The air is nearly suffocating especially in the evening as it becomes cold and the smoke is spreading everywhere.
都会里的天空往往是浓烟密布，空气令人梗塞，尤其是在傍晚，因天气冷，烟雾快速蔓延开来。
Often, the sky is covered by large clouds of smoke from chimneys. The air is nearly suffocating, especially in the evening as it becomes cold and the smoke is spreading everywhere.
今天不仅是天气热，而且烟雾相当糟。
今天不仅是天气热，而且烟雾相当糟。
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