本集内容. Dogs were man's best friend far earlier than thought. 狗成为人类 “最佳伙伴” 的时间远早于早前认知. 文字稿. It's a small piece of jawbone, bu ...

London's biggest air display 伦敦迎来最大规模飞行表演 Episode 180705 / 05 Jul 2018 Learn English words and phrases from this story ...