The maximum mass fraction in the species flow zone is smaller than 0.9.
从组分气流模拟结果看，焊接区组分以辅助气流为主，但其组分质量分数低于0.9。
The fixed sandy dune and lowland among sandy dunes act as converge of material and species flow, and they are also the source of species diffusing.
固定沙丘和丘间低地是物质流和物种流的汇， 同时又是重要的物种扩散的源。
Gene flow, the movement of alleles across the range of the species, is relatively free because individuals can move and then mate with individuals in their new location.
基因流动，即等位基因在整个物种范围内的移动，是相对自由的，因为个体可以移动，然后在新的地点与个体交配。
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