You can detect the presence of back blocks from a failed flash operation (such as an Erase) or an invalid Write operation (discovered through an invalid Error Correction Code, or ECC).

如果 flash 操作（例如 Erase）失败，或者 Write 操作无效（通过无效的错误校正代码发现，Error Correction Code，ECC），那么说明出现了坏块。

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An equation to estimate approximately the error of the displacement vector was given in the correction of the coarse mesh.

在粗网格校正过程中，给出了一种近似求解位移向量误差的方程；

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This paper discusses the property of the indefinite integral, indicating an error in the proof of the textbook and giving a correction.

本文指出了高等数学教科书中，不定积分的一个线性性质的条件及其证明的错误，并给出正确的证明。

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It seems punitive and it is unusual, but it was actually just the correction of an obvious error.

FORBES: Penalty On Qualified Plan Withdrawal To Pay Alimony

With the help of an error correction algorithm trained users were able to reach 37 words per minute, researchers said.

BBC: KALQ thumb-type keyboard takes on Qwerty

Correction 12 January 2009: Due to an editing error, an earlier version of this story misquoted Robert Draper.

BBC: What next for George W Bush?