compulsory   a.义务的；必修的；被强制的

【真题再现】Many countries have adopted systems of compulsory education in order to promote the average level of education.

                许多国家为了提高平均教育水平而采用义务教育体制。

                                                                                      【CET-6,2003.06,词汇】

【联想记单词】词根词缀：com+ps(驱动，推)+ory(a.)→不断推的→强制性的

【活学活用】-It is compulsory to wear helmets!

                 -戴头盔真是被强迫的！

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