The extraction of soil erosion in complex topographical region is much more difficult than that in flat region.
相对与地形平坦地区，复杂地形区土壤侵蚀的提取存在较大的难度。
The frequency response of the drive-direction oscillator has two resonant peaks and a flat region between the peaks.
陀螺驱动频率响应曲线有两个谐振尖峰，在两峰值之间存在一个较平坦的区域。
The frequency response of the drive-direction oscillator has two resonant peaks and a flat region between the peaks.
陀螺驱动频率响应曲线有两个谐振尖峰，在两峰值之间存在一个较平坦的区域。
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