POL (provisional operating license)
基本释义
时运行许可证(执照)
实用场景例句
学术演讲
The geologist explained how porosity affects the permeability of rock formations.
地质学家解释了孔隙率如何影响岩层的渗透性。
学术讨论
The engineer measured the porosity of the soil sample to assess its water retention capacity.
工程师测量了土壤样本的孔隙率，以评估其保水能力。
校园生活
The civil engineering class learned about porosity in construction materials for drainage systems.
土木工程课程学习了排水系统建筑材料中的孔隙率。
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