2．take off 去掉；脱下；起飞；取消

　　3．on average 平均起来

　　4．refer to 参考；指的是

　　5．be experienced at/in 做某事有经验

　　6．end up 结果为......，以......结束

　　7．put down 放下；写下

　　8．because of 由于

　　1．[教材原句]They can destroy houses, but leave the furniture inside exactly where it was.

　　它们能毁掉房子，但把里面的家具留在原地。

　　[句型点拨]leave ＋宾语＋宾补。

　　[佳句赏析]她所需要做的只是在今晚离开时不要锁门。

　　All she has to do is leave the door open when she leaves tonight.

　　2．[教材原句]On average, there are 800 tornadoes in the US each year, causing about 80 deaths and 1，500 injuries.

　　平均来说，美国每年发生800次龙卷风，造成大约80人死亡和1 500人受伤。

　　[句型点拨]现在分词短语作结果状语。

　　[佳句赏析]明年在北京有更多的孩子到了上学的年龄，这导致在首都小学教师短缺。

　　More children in Beijing will reach school age next year, creating a shortage of primary school teachers in the capital.

　　3．[教材原句]There are violent winds of 120 kilometres per hour or more, which cause huge waves, heavy rain and floods.

　　飓风发生时，风暴速度达到每小时120千米或更快，引发巨浪、暴雨和洪灾。

　　[句型点拨]which引导非限制性定语从句。

　　[佳句赏析]凤凰古城是中国的一个很受欢迎的旅游胜地，它的历史可追溯到春秋时期。

　　The ancient city of Phoenix is a popular tourist attraction in China, which dates back to the Spring and Autumn Period.