primary retention
主要保留
以上为机器翻译结果，长、整句建议使用 人工翻译 。
As a result of these initiatives, primary school enrolment and retention rates had more than doubled by 2005.
UNESCO: Country Profile: Sierra Leone
Mian Shuja ur Rehman, Education Minister of Punjab, referred to the commitment of provincial leadership for achieving 100% enrolment and retention of children in primary schools by 2015.
UNESCO: EDUCATION
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