求翻译：当射线入射到胶片时，由于射线的穿透能力很强，大部分穿过胶片，胶片仅吸收入射射线很少的能量。为了更多地吸收射线的能量，缩短曝光时间，在射线照相检验中，常使用前、后增感屏以便达到缩短曝光时间的目的。是什么意思？

When the rays incident to the film, because the rays penetrate strong through the film, the film only absorb very little energy of the incident ray. To absorb the energy of the ray, to shorten the exposure time, radiographic inspection, often after intensifying screens in order to shorten the exposu

When Ray into the field to film, since the beam of the penetration is very strong, most through the film, the film only into the beam very little energy. In order to better absorb the energy beam to reduce exposure time, the radiography inspection, often used before and after screen to shorten the e

When beam incidence to film, because beam penetrability is very strong, the majority of traversing film, the film only absorbs the incident beam very few energies.In order to the more absorption ray energy, reduces the exposure time, in the radiograph examination, often uses the before and after int

When a film is-Ray incident, because of the strong rays penetrating power, most through the film, film absorption of incident rays only a small amount of energy. In order to absorb more radiation energy, reduce the exposure time, radiographic inspection, often used before and after intensifying scre

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