雅思词组1:potential problem潜在问题

With increasing industrial development around the world, the discharge of toxic pollutants is a potential problem for many countries.
随着世界范围内工业的逐步发展，对很多国家来说，有毒污染物的排放是一个潜在问题。

雅思词组2:prefer...to喜欢…胜过…

I much prefer coffee to tea.
我喜欢咖啡远胜过茶。

雅思词组3:present oneself出席(会议等)，到场

Make sure you wear neatly while presenting yourself in the seminar.
出席研讨会时一定要衣着整齐。

雅思词组4:prevent...from阻止

In Australia, where people spend a lot of time at the beach, the government has realized that it must prevent sharks加m swimming near its beaches.
在澳大利亚，人们在沙滩上度过大量时间，政府已经意识到必须阻止鳖鱼游到沙滩附近。

stop...from

雅思词组5:price range价格范围

A:Before I ring, we'd better just make sure the hotels are within the price range.
A:打电话前，我们最好确保这些旅馆的房价在我们能承受的价格范围之内。

B:Up to ￡15 a head?
B:每人最多15英镑?

A I think you'll find some people won't be able to go that high.
A:我觉得你会发现有些人不能承受那么高的价格。

雅思词组6:price structure价格结构，价格构成

A:How much are the tickets?
A:票价是多少?

B:We've introduced a simpler price structure. Ticket prices used to range from ￡6 to ￡30 but now they're all ￡18.
B:我们启用了一套更单一的价格结构。原先票价是从6英镑到30英镑不等，但现在一律18英镑。

雅思词组7:pride oneself on以…自豪，为…感到骄傲(或得意)

We pride ourselves on our friendly service, which are particularly important for the increasing number of people who choose to holiday alone.
我们为能提供舒适的服务感到自豪，舒适的服务对日益增多的独自度假的人而言尤其重要。

be proud of

雅思词组8:proficient in/at熟练，精通

The candidate for this position must be proficient in English and is willing to travel in remote areas.
该职位要求申请者必须精通英语并愿意去偏远地区出差。

雅思词组9:profound influence深刻的影响

The UV-B radiation has profound influence on the immune system in human beings as well as in laboratory mice.
UV-B辐射对人体和实验用小鼠的免疫系统都会产生很大的影响。