中文摘要：

在巨大的星，在内部的传送对流与中间、小的集体星的不同。在小集体星的主要顺序的阶段，有一个对流核心和一个放射的信封，在哪个是有不平的化学丰富的放射的中间的层之间。Semiconvection 将在巨大的星发生在在对流核心和同类的信封之间的中间的层。我们对待核心作为一个过程的一起的对流的射和 semiconvection。我们发现当减少射时， semiconvection 是更显著的。在这二个过程，我们介绍一散开的参数 D，它与为这二个地区介绍了不同参数的另外的作者不同。化学进化和星的结构的另外的数量上的狂暴的散开过程的影响在现在的纸被显示出。

英文摘要：

In massive stars, convection in the interior is different from that of inter- mediate and small mass stars. In the main-sequence phase of small mass stars, there is a convective core and a radiative envelope, between which are the radiative inter- mediate layers with uneven chemical abundances. Semiconvection would occur in the intermediate layers between the convective core and the homogeneous envelope in massive stars. We treat core convective overshooting and semiconvection together as a process. We found that when decreasing overshooting, the semiconvection is more pronounced. In these two processes, we introduce one diffusive parameter D, which is different from other authors who have introduced different parameters for these two zones. The influences of the turbulent diffusion process on chemical evolution and other quantities of the stellar structure are shown in the present paper.