They observed that residents of the compound burned their trash instead of putting it out for collection and concluded that the compound lacked a phone or an Internet connection.
特工们观察到房子的居住者们焚烧垃圾而不是留给垃圾收集处理，他们得出了这座房子缺少电话或网络的结论。
2
Unscrew the nut from the service connection of suction line valve and connect the compound pressure gauge.
将真空泵连于复合压力表，打开复合压力表和真空泵对室内机和连接管抽真空。
3
This paper discusses how to develop the RE compound database system by ADO technology so as to implement high efficient database connection and access.