Mature ovule was componented of nucellus, integument, bead handles, combined point and composition of the nucellar beak.
成熟的胚珠是由珠心、珠被、珠柄，合点和珠心喙组成。
It is componented by the space ionosphere's reflection against short wave.
它是利用空间电离层对短波的反射构成的。
The Method of Weight Factor for VarianceComponentEstimation
权因子法方差分量估计
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