考点词汇就是指雅思阅读中常出现的对句意、题意有着重要影响的词汇。考点词汇也就是雅思阅读中的高频词汇,是考生的必备词汇。今天长沙新航道雅思小编为大家整理的雅思词汇解析 ：环境类（二），希望能给大家带来帮助!

　　1. pungent /'pʌn(d)ʒ(ə)nt/
　　adj. （味道或气味）强烈的，刺激性的
　　e.g. The air is full of the pungent smell of incineration. 空气中弥漫着焚烧的刺鼻气味。
　　本季口语话题：describe a place you visited where air was polluted.
　　e.g. There were many cars, and the smell of exhaust fumes was so pungent and overwhelming that I could not even breathe.
　　Syn. acrid （气味或味道）难闻的，刺激的
　　e.g. Clouds of acrid smoke of burning rubber brought tears to her eyes.
　　注：acrid 和 pungent 也可以用来描述讽刺或者刻薄的言论。
　　e.g. There is an acrid/ pungent tone to your remarks.

　　2. hazardous  /'hæzədəs/
　　adj. 尤指对健康或安全有危险的，有危害的
　　e.g. hazardous waste 有害垃圾。
　　e.g. These are hazardous chemicals that can cause death if inhaled.
　　搭配：be hazardous to = be harmful to
　　e.g. Smoking can be hazardous to your health.
　　n. hazard 危险;危害
　　搭配：pose/ present a hazard to 对…造成危害。
　　e.g.  Fumes from the factory posed a serious hazard to the health of people living in the area.

　　3. smog /smɒg/
　　n. 属于blended word由smoke和fog组成，即雾霾。
　　e.g. As we flew into the airport, we could see a murky yellow smog hovering over the city.
　　注: murky 朦胧的
　　本句同样可以用在口语话题：a place where air was polluted.
　　adj. smoggy
　　e.g. Children who live in areas that are highly polluted and smoggy are more likely to have asthma.
　　注: asthma 哮喘病
　　syn. haze 雾霾
　　e.g. It was a smoggy day and the buildings almost vanished behind a wall of haze.

　　最后学习两个与环境相关的 idioms.
　　1. A drop in the ocean. 沧海一粟
　　e.g. Some countries plant new forests but it's a drop in the ocean.
　　e.g. Unplugging unused appliances may be a drop in the ocean, but it would make a big difference if we all do that.
　　2. A hot potato 烫手山芋，棘手的问题。
　　e.g. Pollution in some countries might be ‘a hot potato’ due to the lack of an effective solution to waste management.

　　以上就是今天全部内容，我们下期见。