The content of formaldehyde is a compulsory examination item in textile inspection, so it is very necessary to understand related factors that affect the determination of formaldehyde content.

甲醛含量作为纺织产品检验工作中的一项强制性考核项目，了解和掌握影响其测定的相关因素是十分必要的。

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British GCSE examination is a certificate examination carried out at the end of compulsory education. This examination has been carried out for over ten years. it has much successful experience.

英国GCSE考试是在义务教育结束时进行的一种证书考试，该考试在英国已实行十余年之久，有诸多成功之处。

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"Antemarital examination in China after the abolition of compulsory antemarital examination rates are falling sharply, and the first line of defense" lost "a lot of issues."

我国取消强制婚检后婚检率急剧下降，第一道防线“失守”带来诸多问题。

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