英语翻译当前动物的数量在不断减少,这是由人类自己造成的.伐树、过度开采自然资源、猎杀珍惜动物、污染空气、污染水资源、工业

Because of human beings ,the number of animais is decreasing so far.
the extinction of massive rare animal is caused by over-lumbered ,excessive exploitation,rare species hunting,air pollution,water pollution,industrial waste,over heavy mental and so on in a direct or indirect way.
so ,we have to protect the environment in all our effect to avoid animal extinction .