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| 11. | An autoclave is usually necessary for preparation of the culture media. |
| 培养基通常要进行高压杀菌。 |
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| 12. | In the present stage our main work is to publish the Pioneer Quarterly, which we regard as the necessary |
| 我们目前的主要工作是出版《先驱季刊》，为普罗大众的解放作必要的思想准备。 |
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| 13. | principally involves space booking for import and export cargoes customs declaration and clearance, preparation |
| 公司的铁路货运代理业务主要包括进出口货物订舱、关及报检，准备所需运输单据，（括铁路运单）中托运和货物分拨。 |
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