freezing and thawing短语¹³¹⁶²⁰⁺³ 基本例句 冻融 In order to quantitatively study freezing and thawing in porous materials, it is necessary to determine the freezing point of the water in the materials. 为了定量地研究发生在多孔材料中的冻融现象，必须首先确定贮存在多孔材料中的液态水的冻结点。 cnki The size of liposomes prepared by freezing and thawing was measured using laser scatteringLS. 采用激光散射法测量了以冻融法制得的脂质体的粒度。 dictall