point-source

基本解释

Airy disk brilliance (the brightness of a point-source stellar image) is proportional to the fourth power of aperture.
艾里斑的亮度(点光源恒星的图像亮度)正比于孔径尺寸的四次方。
At present, two main stochastic models, point-source model and finite-fault model, are adopted to simulate ground motions.
随机法模拟地震动目前主要采用点源模型和有限断层模型两种方法。
For most of the regions, isoseismals are of somewhat elongated shape. The empirical point-ellipse model can reduce systematic deviation of point-source and fault-rupture models.
对多数地区，等震线略具狭长的形状，经验点椭圆模型可以减小点源模型和断层破裂模型的系统偏差。

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a source of light or other radiation that can be considered to have negligible dimensions