secondhand books是什么意思

用法例句

Problems and solutions of library s building the stacks of backdating the secondhand books;

图书馆在旧书回溯建库中遇见的问题及解决方法

The effect of flotation parameters such as flotation consistency,temperature,flotation time,air to pulp ratio,turbulence level(velocity of pulp flow),and pH on domestic old book paper deinking efficiency was studied by using a high-consistency laboratory pulper and a laboratory deinking cell developed by ourselves.

利用实验室研制的高浓碎浆机和浮选脱墨槽研究了国产废旧书刊纸脱墨浆的主要浮选条件。

The paper analyses the business process of online sales of second-hand books towards college students,designs and develops management information systems using Browser/Server model,which are fit for the business points and thereby realize automatization and high efficiency of the business operation.

对面向高校学生的在线旧书销售业务流程进行了分析,采用B/S模式设计开发出一套适合业务特点的管理信息系统,从而实现了企业运营的自动化、高效化。