[ti:UNIT 6 Let's Go! Lesson 46: Let's Go to the Zoo!] [00:01.54]UNIT 6 第六单元 [00:03.35]Let's Go! 我们出发吧! [00:05.65]Lesson 46: 第46课: [00:07.78]Let's Go to the Zoo! 我们去动物园吧! [00:10.94]1. [00:12.17]What is it? 它是...