As to the time to correct grammatical errors, there are three alternatives: immediate correction, delayed correction and postponed correction.
纠错时机通常分为立即纠正，滞后纠正和延迟纠正。
As to the time to correct grammatical errors, there are three alternatives: immediate correction, delayed correction and postponed correction.
纠错时机通常分为立即纠正，滞后纠正和延迟纠正。
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