【雅思阅读长难句】长句难句速破译(159)

2022-06-11 01:13:56

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  雅思阅读长难句分析

长难句 The hypothesis that begging calls have evolved properties that reduce their potential for attracting predators yields a prediction: baby birds of species that experience high rates of nest predation should produce softer begging signals of higher frequency than nestlings of other species less often victimized by nest predators.

主语

The hypothesis that begging calls have evolved properties that reduce their potential for attracting predators

谓语

yields

宾语

a prediction

译文

关于乞讨声发展演化出一些性质,能够降低幼鸟吸引捕食者的潜在危险的假说产生出一个预言,那些被捕食频率较高的幼鸟种群应该比那些很少被捕食的种群产生出更柔和的高频乞讨信号。

解析

本句难点在于复杂修饰。主语hypothesis后that引导的从句作同位语,此从句中又有一个that reduce…predators从句作定语修饰properties;冒号后面的部分是对prediction的解释。

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