本集核心英语单词及例句：

1.fence (n.)栅栏
The wooden fence kept chimps from charging into camp and scattering provisions.
木篱笆的作用是阻止大猩猩爬进帐蓬，把食物丢得到处都是。

2.straddle (v.)叉开腿；跨坐
A small wooden bridge straddled the dike.
一座小木桥横跨在排水渠上。

3.decision (v.)决定；果断
We must come to a decision about what to do next by tomorrow.
我们必须最晚明天就必须决定下一步要做什么。

4.politic (n.)政治，政治学
Employment and taxation are the bread-and-butter issues of politics.
就业和征税是很重要的政治问题。

5.painful (adj.)痛苦的
It was painful for him to renounce his son.
宣布与儿子脱离关系对他来说是很痛苦的。