These studies of speciation in action illustrate the plausibility of reinforcement and sympatric speciation, both of which are increasingly well supported by theory (12) and empirical work (table S1).

• 这些有关物种形成过程及同域物种的形成的研究表明似乎更加有理，两者都愈来愈为理论(12)和经验工作所支持（表S1）。