1 . Applying oil to the injured areas is a bad idea, as it will keep the heat in the wounds and may cause infection. （英译汉）

2 . Since it can be too cold to go outdoors, Edmonton is home to many shopping malls. （英译汉）

3 . I chose the exchange programme because I wanted to learn about global business and improve my English. (英译汉)

4 . However, after the Songhu Battle broke out in 1932, Qian made the decision to switch his major to aviation because he realised that China needed its own powerful air force to protect and defend the country. (英译汉)

5 . Now the gold is yours, because you are the only person that has learnt the lesson I wanted to teach my people. (英译汉)