精选优质文档-倾情为你奉上Lesson 42 Modern cavemen一、单词讲解 New words and expressionscaveman n 洞穴人（穴居人）cave n.洞穴（天然的） caveman n. （远古）洞穴人a man living in a cave thousands of years agocavern kv()n n. 大洞穴，大山洞 a large cavecavity kvt n.洞，腔（正式的医学术语）；（龋齿的）洞pothole pthl n.锅穴（冰原），壶穴（河床）（地质）potholing n.洞穴探险（运动）potholer n.洞穴探险者solitude sltju:d n.孤独、寂寞（2.独处）（enjoying being alone, being without companions）六级罕见live in solitude 独自（居住）生活isolation n.隔离、孤立（不情愿地
