In the former case the education is incidental; it is natural and important, but it is not the express reason of the association.
对于前者，教育是偶然的，很自然，也很重要，但它不是这种联系存在的特别的理由。
A free books and incidental expenses plan for special children in 9 years of compulsory education has been formulated.
制订了9年义务教育阶段特殊儿童免书杂费方案；
A free books and incidental expenses plan for special children in 9 years of compulsory education has been formulated.
制订了9年义务教育阶段特殊儿童免书杂费方案；
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