凭借低缓的进场速度以及急剧升降的性能，飞机的声响不会传到机场之外。
Its low approach speed, combined with steep climbs and descents, would make it inaudible outside the airport.
在这种情况下，公司的反应可能不够迅速或周到，学习曲线急剧升降。
In such a case, the company's response may not be sufficiently quick or thoughtful, and the learning curve has been steep.
还有几次，新的代码被引入或者旧的代码被重构出去，这些可以从代码行计数的急剧升降上表现出来。
There are various times when new code was introduced or old code was refactored away as indicated by sharp rises or drops in the lines of code count.
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