1.      When summer is in full swing，it is best to have an iced water to cool down.

2.      During the season，high temperature is everyone’s nightmare.

3.      It not only gives rise to a heat wave but threatens our health due to its high degrees of pollutants.

4.      In the long run，people’s health change for the worse once being faced with a sudden climatic diversion.

5.      Some specialists assume that staying in an air-conditioned room is better than go out on a hot summer’s day.

6.      But to be frank with you，the benefit of the former is temporary.

7.      As we all know，pollution does a lot of damage to the environment around us.

8.      It affects our respiratory system for its toxic substances.

9.      We ought to take immediate action at the expense of our use of electrical equipments.

10.  Otherwise，it is about to wreak havoc on all of us all over the world.

1.      in full swing  處於全盛時

2.      cool down.  消暑

3.      temperature  溫度

4.      nightmare  夢魘

5.      give rise to  造成

6.      threaten  威脅

7.      pollutant  污染物

8.      In the long run  長期下來

9.      change for the worse  變糟

10.  diversion  轉變

11.  assume  以為

12.  to be frank with you  老實說

13.  temporary  暫時的

14.  respiratory system  呼吸道系統

15.  toxic  有毒的

16.  ought to  應該