重点讲解：
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.
我叫他们当心人行道上路滑的地方XaX=R[n[^-]uR_@-。
eg. You have to watch out for insincere people.
你得小心那些虚情假意的人*L^C!s|9ucJe1y。
2. scout for
（在某地）搜索，寻找；
eg. A team of four was sent to scout for a nuclear test site.
一个4人小分队被派出寻找核试验地C[C93byrd.@pGS5L*2A。
eg. Go and scout for firewood for the picnic.
去找些柴来做野餐11n*OF0w4Y_Ga1。
3. on purpose
特意地；故意地；有意地；
eg. He explained that he have not do it on purpose.
他解释他不是故意做这件事的8l!UNq*U;+#jnXdMI。
eg. I don't think he stepped on your toes on purpose.
我想他不是有意伤害你的感情%wLE[ujgVu。