在大约3亿1千5白万年前，一只昆虫落在一块泥片上，呆了会儿就飞走了。
About 315 million years ago, an insect landed on a muddy patch, sat for a while and flew off.
一只蝴蝶一只昆虫。它蛋放在一个叶子上。这蛋是小的并且白的。
A butterfly is an insect.It lays eggs on a leaf.The eggs are small and white.
一只蝴蝶一只昆虫。它蛋放在一个叶子上。这蛋是小的并且白的。
A butterfly is an insect.It lays eggs on a leaf.The eggs are small and white.
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