Dna studies suggest the two species did not interbreed .
dna研究显示二者没有混种杂交。
Since they no longer meet , they no longer interbreed .
因为他们不再碰面，所以他们也无法进行交配繁殖。
Our training was vast ; we chose not to marry or interbreed , as this was perceived as only a purpose for those of lesser spiritual status upon sirius .
我们的训练是大量的；我们不选择结婚或生孩子，因为在天狼星上，这被认为是更少灵性地位的人的唯一目的。
Steelhead populations and rainbow trout populations can and do interbreed at different levels .
刚头种群和虹鳟种群可以杂交，实际上也发生不同水平的杂交。
Related species that are not geographically isolated , and which could interbreed but in practice do not because of differences in behavior , breeding season , etc. , are called sympatric species .
