Florbetapir is a radioactive coloring agent.

VOA: special.2011.02.08

learning how to read and playing blocks and coloring and singing and dancing

学习阅读、玩积木、涂色、唱歌和跳舞

在空闲时间 - SpeakingMax英语口语达人

learning how to read and playing blocks and coloring and singing and dancing

学习阅读、玩积木、涂色、唱歌和跳舞

在空闲时间 - SpeakingMax英语口语达人