v.（使）异种交配，（使）混种，（使）杂种繁殖
These species do not interbreed.
这些物种不能杂交.
Since the birds interbreed they cannot be classed as different species.
由于这些鸟进行杂交繁殖，不能把它们归为不同的物种。
To mate so as to produce a hybrid; interbreed.
杂交为产生杂种而交配; 杂交.
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