凡作用于液体表面，使液体表面积缩小的力，称为液体表面张力。它产生的原因是 液体跟气体接触的表面存在一个薄层，叫做表面层，表面层里的分子比液体内部稀疏，分子间的距离比液体内部大一些，分子间的相互作用表现为引力。就象你要把弹簧拉开些，弹簧反而表现具有收缩的趋势。正是因为这种张力的存在，有些小昆虫才能无拘无束地在水面上行走自如。
阐述用电子分析天平测量液体表面张力系数的原理和方法。
The theory and method that the surface tension coefficient of liquid is measured by an electronic analytical balance is introduced.
随着浸泡液体表面张力的增大，砂浆的膨胀应变线性增大。
The swelling strain of mortar increases linearly with the increase of surface tension of immersion liquids.
农业生产上经常会遇到要研究液体表面张力，测量表面张力系数的问题。
In the agricultural production, It is often to meet some questions about liquids superficial phenomenon, It need to study the liquid surface tension and measure the liquid surface tension coefficient.
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