Arrangement of microspores in a tetrade is isobilateral shaped The mature pollen grain is 3-celled type, the sperms are crescent shaped.
小孢子在四分体中的排列为等面形。成熟花粉粒为3细胞型,精子为新月形。
We introduce a new kind of semiconducter material named quantum-dot quantum wells ( QDQWs) and establish a proper mathematical model for it. After that, we introduce a sort of expansion function celled B-spline and analogise it's normal quality.
介绍了一种被称为量子点量子阱(Quantum-dot quantum wells简称QDQWs)的新型半导体材料,并为其建立了合适的计算模型。
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