点击下方单词,选择对的这个单词
点击下面链接下载与本句相关的学习资源，包括PDF教材和音频练习，方便课后复习：
1. 陆龟;(乌)龟A tortoise is a slow-moving animal with a shell into which it can pull its head and legs for protection.
1. usually herbivorous land turtles having clawed elephant-like limbsworldwide in arid area except Australia and Antarctica
多通过句子记忆单词，而不是单独死记硬背。
