英语翻译

英语翻译
课文：今天作业是到See Earth Histroy
chapert 3look it up!
dinosaurs
dinosaurs existed on earth more than sicty million years before human beings.they lived everywhere.some dinosaurs were as small as chickens.others were as big as ten elephants.some dinosaurs even had wings and could fly.some dinosaurs were gentle and ate plants.others were fierce and ate meat.dinosuras all died out suddenly.nobody knows the reason.however,prople can learn about the lives of dinosaurs from fossils of their skeletons,eggs and footprints.(see earth history)