After using this instrument, the true value of the spherical diameter size could be measured.
使用该仪器后，可测出球面直径尺寸的真实值。
Reduction of RBC area, circumference, diameter, and spherical diameter of rats were only induced by IDA and exercise under IDA.
红细胞面积、周长、直径和球径仅在铁缺乏情况下缩小；
Vesta’s size (it is around 520km in diameter) and density make it massive enough for its gravity to keep it roughly spherical, like a proper planet.
与真正行星相仿，灶神星的尺寸（直径大约为520公里）和密度使其具备足够的引力保持基本的球体形状。
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