An incidental cause stimulated the naturalist's interest in the cave men's life. 一个偶然的原因激发了这位自然学家对穴居人生活的兴趣。
The back part was too big and high, with ruffles of leather hanging off, and looked like it had been sewn together by a cave man. 鞋后跟又高又大，且皮革褶边，看上去像穴居人的缝制品。
美
