caveman

例句：

1. 1.The caveman had a simple life in the cave.
   洞穴人生活在洞穴里，过着简单的日子。
2. 2. The caveman used to live in the caves.
   洞穴人过去一直住在洞穴里。
3. 3. The caveman was an expert in hunting and gathering.
   洞穴人擅长狩猎和采集食物。