重点讲解：
1. and so on 及诸如此类；等等；
例句：omorrow night, she was ready to go shopping with her mother to buy what she wanted , such as milk, bananas, apples, Hamburg and so on.
明天晚上她准备和她妈妈去商店买东西，她想买很多东西，比如牛奶，香蕉，苹果，汉堡等等On9kEQxJ]3r@A+!。
2. match up 与…配对；与…匹配；
例句：I'm sure that yellow lead matched up to that yellow socket.
我敢肯定那根黄线接那个黄色插口td)8(o|)syVZd,m@lv。
3. on average 平均起来；按平均值；
例句：On average, bacterias are about 1 micrometre long.
细菌的平均长度大约1微米~2zp+CRW_L。
4. in general 总的来说；总体上来看；大体上；
例句：In general her work has been good, but this essay is dreadful.
总的说来，她的作品不错，不过这篇文章糟透了S=QI3E*.ugx7|L5。