Many books that are out of print are reissued in paperback form.许多绝版的书籍又以平装本形式重新出现.The book has gone out of print.此书已经售罄.I believe the book is now out of print, but it can easily be borrowed from libraries.我想这本书现在已经停印了,但...
蚯蚓做了使土壤透气的重要工作。Earthworms do the important job of aerating the soil.蚯蚓钻土很深。Earthworms burrow deep into the soil.他们正在挖蚯蚓作鱼饵.They were digging up worms to use for bait....