具有多于一层深度的嵌套配置(直到可以被appconfig散列处理的一层)。
Have configurations nested more than one layer deep (up to one layer can be handled with the AppConfig hashes).
因为该系统往往使用高频电波（所以波长较短），当遇到很小的物体时（ 译者注 ：波长短，频散很严重，导致探测深度浅。
That is because such systems use high-frequency (and therefore short-wavelength) radio waves that readily bounce off small objects that they encounter.
本文使用高阶方程深度偏移方法，并且在计算中采用了一种与差分运算等价的时移法解决了计算中出现的频散和振幅失真问题。
The depth migration with higher-order approximation by time-shift algorithm eliminates the frequency dispersion and amplitude distortion in the calculation process.
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