The education of the nine-year system in China is free.

在中国，九年制义务教育是免费的。

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On the nine busiest days of the Games there will be more than 1m Olympics-related journeys, with a report earlier this year warning of "extreme" conditions on a system already "creaking at the seams".

奥运会期间最繁忙的九天将负荷超过100万次和奥运会有关的出行，今年早些时候的一份报告就警告说一个系统的“极端”状况已经“在岌岌可危了”。

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"Nine-year persistent system" is a kind of schooling model in which nine-year compulsory education is persistent, systemic and unitary.

“九年一贯制”是指小学、初中联体办学，使九年义务教育成为一个连续、系统、整体的一种学制模式。

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One week before the school year began, workers finished removing mold from the air-conditioning system and teachers spent nine-hour days repainting the school to give it a distinctive identity.

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