Many requirements errors are passed undetected to the later stages of the life cycle and correcting those errors during or after implementation phase is found to be extremely costly.
许多未被发现的需求错误被传递到生命周期的后继阶段，在后继阶段更正这些错误将花费更多。
Thee key is that those mistakes help language learners by showing them the limits of language, and correcting errors before they become ingrained.
其实，这些错误可以帮助学习者发现自己语言学习的不足，并在错误根深蒂固之前予以纠正。
The key is that those mistakes help language learners by showing them the limits of language, and correcting errors before they become ingrained.
其实，这些错误可以帮助学习者发现自己语言学习的不足，并在错误根深蒂固之前予以纠正。
The key is that those mistakes help language learners by showing them the limits of language, and correcting errors before they become ingrained.
其实，这些错误可以帮助学习者发现自己语言学习的不足，并在错误根深蒂固之前予以纠正。
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