peripheral|peripherals

我需要一个新的打印机作为电脑的外部设备。

I need a new printer as a ___peripheral for my computer.

我需要购买一些新的电脑外设，比如鼠标和键盘。

I need to buy some new ___peripherals for my computer, like a mouse and keyboard.

这个问题只是会议中一个次要的议题。

This issue was only a ___peripheral topic in the meeting.