1. Scientists have been attempting to avianize certain reptiles by modifying their physical characteristics to resemble birds.
科学家一直在试图通过修改物种的外部特征，使某些爬行动物具有鸟类的特征。

2. The process of avianizing an organism involves adapting its behavior and physiology to mimic that of birds.
使一种生物具有鸟类特征的过程涉及到适应鸟类的行为和生理特性。