英语问题,急阿!翻译下面一段话（知识要在初中范围内,句子要简单些） 我是住在城市里的一棵大树,时时刻刻保护着城市的环境.

I am a tree living in the city ,gladness to protect the environment of the city.
We actually are very useful,for example,purify the air,beautify cities,supply oxygen,etc.But we've always been some people,cause the environment from being more overcutting serious destruction.
We will continue to protect the city,so people should always protect us.

I am a tree living in the city. I'm on duty to protect the city's environment every second of my life.
We are actually very useful in purifying the air, decorating the city and of course supplyin...

I'm a big tree in the city, protecting the city's surroundings all the time.
we're useful actually,such as purifying the air,beautifying the city,supplying oxygen and so on.However,we're always cut down by people, leading to more seriously damage.
we'll keep protecting the city, so people should keep protecting us.