You have what we call a total cross section which is the total probabilities of either scattering or absorption. These are the two phenomenon that we are talking about.
你们有我们称为总横截面的,那是散射或者吸收的总概率,这些是我们要谈论的,2个现象。
The project has used large-span secondary girder pre-stressed ceiling structure, which effectively reduces the beam cross-section height and ensures the total height and building height requirements.
工程中采用了大跨度次梁预应力楼盖结构，有效地降低梁的截面高度，确保层高和建筑物总高度的要求，此外还采用了超长混凝土结构无缝设计等新技术。
Particles of energy E are scattered by a certain potential well. In finding the total scattering cross section, the physical background are often ignored.
能量为E的粒子被某一势阱散射，如果推求总散射截面常常易忽视物理背景。
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