Collection and management of evaluating materials are research-based work and must sufficiently understand index connotation and mine the materials from the Angle of "four characteristics".
评估材料的收集整理工作是一项极具研究性质的工作，搞好评估支撑材料必须充分理解指标内涵，从“四性”的角度深度挖掘材料。
As an important evaluating index reflecting the quality of materials, natural durability can directly determine the using longevity of materials.
作为一项反映材料优劣的重要的评价指标，天然耐久性直接决定了材料的使用寿命。
The student must therefore develop skill in locating, selecting, and evaluating library materials.
因而，学生必须提高查找、选择和评价图书馆资料的能力。
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