【自然科普讀本：瀕危的珊瑚礁生態】
Step Into Reading 系列讀本，按照單字程度、生字量、句型變化等等難易度分成5個等級。
Did you know that coral is actually a living creature? Read about this fragile ecosystem in this Step 3 reader, now in Step into Reading!
The world's most famous coral reef, the Great Barrier Reef, is so big that astronauts can see it from outer space! Independent readers will love learning fun facts about coral reefs, the beautiful fish who make it their home, and why these amazing habitats are in danger.
Step 3 Readers feature engaging characters in easy-to-follow plots about popular topics; for children who are ready to read on their own.
