It also teaches you to protect your scripts from program changes by providing a stable interface that will shield the actual actions your scripts perform from the way that you call those actions.
它也通过提供一个稳定的接口来为您保护您的脚本免受程序变更的影响，此接口能够隐藏您的脚本所执行的实际操作。
From this time onward the greater part of the shield remained stable.
从此以后，地质的火部分保持稳定状态。
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