我们需要购买一些文具，比如笔、纸和文件夹。

We need to buy some stationery, ___i.e. pens, paper, and folders.

我们需要准备一些必需品，即牙膏、牙刷和毛巾。

We need to prepare some essentials, ___i.e. toothpaste, toothbrush, and towels.