网友回答：
替我们赶走坏人；猫会捉老鼠；啄木鸟是森林的好医生…… so that it can stand firmly on the straight trunk，使它能够牢牢地站在直直的树干上，hardworking woodpeckers fly from one tree to another every day. they treat every tree carefully. they are really good doctors in the forest. two of which are faci
温馨提醒：随时光变迁，文中所陈述观点；准确性、难免有所变动，因此文中观点仅供参考。
