更糟糕的是，传统的土地测量方法制作的等高线平面只能描述大概的地形而无法描述该地区大量的岩石和灌木丛。
To make matters worse, conventional land surveying produces contour plans that describe the topography only with no ability to describe the plethora of rocks and bush.
它笨拙地坠落到地面，落在一堆乱草之中，线也缠在一丛枯死的灌木上。
It fluttered ungracefully to the ground and landed in a tangled mass of weeds and string against a dead bush.
它笨拙地坠落到地面，落在一堆乱草之中，线也缠在一丛枯死的灌木上。
It fluttered ungracefully to the ground and landed in a tangled mass of weeds and string against a dead bush.
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