我把所有的音乐都备份到这些光盘上了。

I backed up all my music onto these ___discs.

我们在公园里玩飞盘，他总能接住我扔出的飞盘。

We were playing with ___discs in the park, and he always caught the ones I threw.

长时间的坐姿可能导致椎间盘受压。

Sitting for long hours can put pressure on the ___discs in your spine.