这种类似于平面图的效果是由于拍摄角度和当时空间站位置距离的因素造成的。
The flattened perspective of the urban areas is the result of the viewing Angle and distance from the ISS.
超声引导经皮穿刺肾囊肿硬化治疗3例，囊肿抽吸与硬化过程中，实时双平面成像观察囊肿大小的变化情况及针尖与囊肿腔的空间位置关系，确保针尖始终位于囊肿腔中；
During treatments of 3 renal cysts the changes of cysts and the spatial relations between needle tips and renal cysts were observed to confirm that the needle tips were always in the cysts.
当声波是空间位置和时间的周期函数时，平面波误差项永远是一负偏差项。
The plane wave error is always negative windage, when the sound wave is the cycle function of space and time.
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