The septum, lateral, anterior and inferior walls of the mitral annulus were displayed, and selected for DTI spectral sampling.

记录二尖瓣环侧壁、间隔、前壁和下壁的运动频谱。

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We studied reflecting spectral change characteristics in the depth profile of major soils in Hunan province through field sampling and lab analysis.

通过野外采样和室内测定，研究了湖南省主要类型土壤反射光谱的剖面变化特性。

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Spectral data sources of sandy land included single surface feature and composite surface feature, and their spectral data were measured by different sampling methods.

沙化土地光谱数据源分为单一地物类型级和复合地物类型级两种，野外测量时分别采取不同的采样方法。

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