[00:00.20]Useful expressions
[00:02.35]常用表達法
[00:03.01]Unit 4
[00:04.27]第4單元
[00:05.21]What's this?
[00:06.03]這是什么？
[00:07.47]It's a duck.
[00:08.41]（它）是只鴨子。
[00:09.25]What's that?
[00:10.11]那是什么？
[00:10.77]Cool! I like it.
[00:12.53]酷！我喜歡它。