重点讲解：
1. speed up
（使）（某一过程或活动）加快；
eg. This system helps speed up access times.
这个系统有助于加快存取时间.N.9UpN,uj。
eg. Once these difficulties were got over, the work would speed up.
一旦克服了这些困难，工作进展就快了a9@vW!~+IA]n。
2. in operation
使用；运作；
eg. There are three ski lifts in operation.
有3台滑雪缆车在运行QUc;r9UuaICjFY7]Q。
eg. Part of the new plant is now in operation and remainder will be on stream later this month.
新工厂现已部分开工，其余部分在本月末将全部投产8Ay9NUGT+~|。
3. be guilty of
犯罪的；有罪的；
eg. He was sentenced to be guilty of intrusion upon my privacy.
他因侵犯我的隐私权被判有罪RC)gY%qOT-z+K。
eg. The neighbor was guilty of murder.
他的邻居犯了谋杀罪1K77U20v-Jgc;asCS。