请用英语说说恐龙灭绝的原因,（最好是中英对照）谢谢!

There are many guesses on how dinorsaurs became extinct.I will now unfold some of those theories.
The first one is that dinorsaurs died because the earth was stuck by a nother planet,it caused earthquake and volcano eruption everywhere,and the poor dinorsaurs have nowhere to escape.
Another one is that,the earth became very cold,so plants died followed by the death of vegetarian dinorsaurs,and led to the death of carnivore dinorsaurs,so they all died.
These are the main guesses on how dinosaurs became extinct.