There are many useful animal we on earth, we should protect them.
青蛙它是两栖动物。它生活在水里，或在靠近水边的地方。它专门吃田里害虫。它是农作物的“忠诚卫士”，是天然的捕虫机。一只青蛙平均一天吃70只害虫，一年能吃掉15000条害虫。
Frog it is amphibious animal. It lives in the water, or in close proximity to the waters. It is designed for field pests. It is the crop "loyal guards", is a natural insect catching machine. The average of a frog to eat 70 pests a day, a year can eat 15000 pests.
蜻蜓也很厉害。一只蜻蜓一个小时能吃20个蝇子或840只蚊子，真令人惊讶!
Dragonfly is also very powerful. A dragonfly one hour to eat 20 or 840 mosquitoes fly, really surprising!
燕子就更厉害了，它一只燕子一个夏天就能吃掉50万条害虫，燕子真是人类的好帮手!
The swallow is even more powerful, it is a swallow a summer can eat 500000 pests, swallow is a really good helper!
蜜蜂可以给我们人类带来甜甜的蜜，它也对我们有益的，我们要保护它。
Bees can give us to bring sweet honey, it is good for us, we must protect it.
地球上的有益动物，我们都要保护它们。
Useful animal on earth, we should protect them.
