What those early craftsmen had found by trial and error was that under pressure a pagoda's loose stack of floors could be made to slither to and fro independent of one another.

"那些早期的工匠通过反复试验发现：在压力作用下，宝塔松散堆叠的楼层可以彼此独立地来回滑动。

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Because the software stack is a loose set of components rather than a monolithic stack, tuning for performance can be a challenge since each component needs to be analyzed and tuned.

由于软件栈是一个松散的组件集，而非一个整体堆栈，性能调优是一大挑战，因为需要分析和调优每个组件。

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