他们看到了各种各样的恐龙，了解了它们之间的区别，也知道了这些生物在地球上出现的历史时期。
They learn about the differences between all kinds of dinosaurs and the different eras these creatures roamed to earth.
他们看到了各种各样的恐龙，了解了它们之间的区别，也知道了这些生物在地球上出现的历史时期。
They learn about the differences between all kinds of dinosaurs and the different eras these creatures roamed to earth.
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