你那套新滑板装备太酷了！

Your new skateboard gear is totally ___rad!

这场RA音乐会旨在通过音乐传递反种族主义的信息。

The ___RA concert aimed to spread anti-racism messages through music.

这位著名的艺术家最近被授予了RA的头衔。

The renowned artist was recently awarded the title of ___RA.

老师在黑板上写下Ra作为镭的元素符号。

The teacher wrote ___Ra on the blackboard as the chemical symbol for radium.