Transitional fossils are the ones that exhibit intermediate states between an ancestral form and its descendants. This concept can be applied to technology, for instance, mobile devices. The first phones with primitive Internet capability were transitional between voice-only phones and the smartphones of today.

中文翻译：

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过渡电话

过渡化石是在祖先形式及其后代之间表现出中间状态的人。该概念可以应用于例如移动设备的技术。第一批具有原始Internet功能的电话已在纯语音电话和当今的智能手机之间过渡。