重點講解：
1. watch out
小心，提防（不愉快的事情或陷入困境）；
eg. I advised them to watch out for slick spots on the sidewalk.
我叫他們當心人行道上路滑的地方q~y!ZA#z5gi*nu。
eg. You have to watch out for insincere people.
你得小心那些虛情假意的人f]&x+.0i15Lb。
2. scout for
（在某地）搜索，尋找；
eg. A team of four was sent to scout for a nuclear test site.
一個4人小分隊被派出尋找核試驗地0xMAd2i_B3rG。
eg. Go and scout for firewood for the picnic.
去找些柴來做野餐KtF=IV&v9Zvh。
3. on purpose
特意地；故意地；有意地；
eg. He explained that he have not do it on purpose.
他解釋他不是故意做這件事的vmKGCU+5a87t.Hvr4O_x。
eg. I don't think he stepped on your toes on purpose.
我想他不是有意傷害你的感情*|^Tr-zWcy8。