基本解釋[數(shù)學(xué)]中心定位樣本詞組短語(yǔ)短語(yǔ)centrally located systematic sample 中點(diǎn)定位系統(tǒng)樣本centrally located sample更多詞組專(zhuān)業(yè)釋義數(shù)學(xué)中心定位樣本