重点讲解：
1. to and fro 往返地；来回地；
She rocked the baby to and fro.
她来回摇动着婴儿i3kCfbzl7;[3u7,,z8GG。
2. drive off 击退；赶走；
Men drove off the dogs with stones.
人们用石头赶走了狗群Sq)k![KTFF]HZuX]#。
3. buddy up 亲近（某人），（和某人）结交；
If you buddy up with someone from work, you'll be less likely to skip out on trips from the office to the gym.
如果你和工作伙伴一起，就不太会逃避从办公室到健身房的那段路了,!(2b=1au8Q[~ohQJ.G0。
4. scare off 吓跑；
Don't get closer, or you will scare off those cute birds.
不要再靠近了，不然你会把那些可爱的鸟给吓跑2OKJu-mmYkkF0mR6m。