Further development of the central cell mainly involved changes in the orientation of the polar nuclei and the distribution of the cytoplasm.
中央细胞以后的发育主要是极核的发育和极核周围胞质的变化。
A polar PEG-20M column was applied for the analysis of the contents and distribution of FAME in biodiesels from 8 different vegetable oils.
采用极性聚乙二醇色谱柱测定了8种不同植物油中脂肪酸甲酯的含量和分布。
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