Translate the following English sentences from the text into Chinese. 1) These cave paintings are not only one of the oldest but also the most elaborated works of cave art. 2) Animals, such as the buffalo or horses, were not only used as food but also meant strength. 3) As the cave paintings show, people have been making art for a very long time. 4) For the ancient Egyptians, art was an important part of their religion. 5) The history of painting is a long river of creativity, which continues into the 21st century.