重点讲解：
1. on average 平均起来；基本上；
例句：his means that the registration process is often significantly simpler and faster, taking, on average, six months.
这意味着注册程序经常是十分简单和快速的，平均一般需要6个月MPoA1d@U_Y6L1N22。
2. in other words 换言之；换句话说；也就是说；
例句：In other words, whatever the prices, people will just have to buy them.
换句话说，无论价格如何变化，人们要买还得买h+%6]3i,R,evp!,=6y=i。
3. in particular 尤其；特别；
例句：He loves science fiction in particular.
他特别喜爱科幻小说Qb=VX|pZ,i|]。
4. in addition to 另外；加之；除…之外；
例句：There are twelve registered letters to be sent in addition to this packet.
除了这个包裹外，还有12个挂号信也需投寄3@7k!Xi=0I。