08/11/12 23:28:16
訳教えて下さい。
There are several theories about why dinosaurs disappeared. One popular theory is the climatic change theory.
This theory argues that climatic changes caused the dinosaurs to become extinct.
Sixty-five million years ago,the climate of the world gradually became colder.
As the earth became colder,fewer plants were able to grow.
The cold weather resulted in a severe food shortage for the dinosaurs,because most dinosaurs were vegetarians and they depended on plants for food.
In summary,then,the disappearance of dinosaurs was directly caused by a shortage of food,but,it was indirectly caused by climatic changes.
According to the climatic change theory,dinosaurs disappeared slowly as their food supply dwindled.
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