The breakthrough for research into intersexual selection came in the development of a new technique for investigating female response in the laboratory.

雌雄间性选择研究的突破来自于在实验室研究女性反应的新技术的发展。

The evidence suggests that warblers use their extremely elaborate songs primarily to attract females, clearly confirming the effect of intersexual selection on the evolution of birdsong.

证据表明，莺主要用它们极其精致的歌声吸引雌性，这清楚地证实了雌雄间选择对鸟类鸣叫进化的影响。