This is one idea of how selecting for behavioral characteristics like friendliness, may also select for more juvenile, cuter physical traits.

这是一个关于如何选择行为特征，如友善，也可能选择更年轻、更可爱的身体特征的观点。

Interestingly, the crane is not only revered for its symbolism but also for its behavioral characteristics.

有趣的是，起重机不仅因其象征意义而受到尊敬，还因其行为特征而受到尊敬。

This is one idea how selecting for behavioral characteristics like friendliness may also select for more juvenile, cuter physical traits.

这是为什么选择友善等行为特征也可能选择更年轻 更可爱的身体特征的一种观点。