Compound sentence: the system shall be able to display the elapsed time for the car to make one circuit around the track, and the time format shall be hh: mm: ss.
并列句：系统应能显示车沿跑道绕行一圈花费的时间，且时间的格式应是hh： mm： ss。
2
In the future, portals may even be able to aggregate compound services and, thus, be able to aggregate UIs on a higher level.
将来，门户甚至能够集成组合服务，因而能够在更高的层次上聚合ui。
3
Instead it looks at how this compound is made in nature, which may allow scientists to make more of it in the lab and be able to research its potential USES.