本集核心英语单词及例句：

1.forest (n.)森林；丛林
Some of the parts of this forest are inaccessible unless you have a four-wheel drive pick-up.
森林的一些部分仍然人迹罕至，除非你开辆四轮皮卡。

2.bark (n.)树皮(vi.)吠叫
That good-ole boy's bark is bigger than his bite.
那家伙的废话只是危言耸听而已。
Don't let your dogs bark all night long!
别让你的狗通宵叫！

3.fluent (adj.)流利的；流畅的
Liz may look like a total idiot, but her Russian is super fluent.
他有可能看起来像个笨蛋，但是他说一口流利的俄语。