They found that turning the air off for a set amount of time maximized nitrogen and organic compound removal.

他们发现，在一定时间内关闭空气流通可以最大程度上减少氮和有机化合物的含量。

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。

As time went on, she got to train him, and, while he was little, let him follow her like a puppy around the compound.

随着时间的流逝，她训练它，并且，在它小的时候，让它像一只小狗一样在围栏里跟着她到处转。

In addition, increases in system complexity over time, tight development schedules that force poor design decisions, and lack of system documentation can compound the problem.

另外，随时间而增长的系统复杂性、紧张的开发进度、不好的设计决策、短缺的系统文档，这些都使问题显得更加突出。

At the same time, it is insufficient to provide true thread safety, in that many common compound operations still require additional synchronization.

同时，这样仍不足以提供真正的线程安全性，许多公用的混合操作仍然需要额外的同步。