Office workers are well aware of the many kinds of paper they use, such as regular typing or computer printing or copier paper.

办公室人员很清楚他们所用的许多种类的纸张，例如一般的打字或计算机打印或影印纸张。

It was written on cheap copier paper, in black ink, and there were a couple of crossings-out, as if the writer had struggled with what he wanted to say.

它是用黑色墨水写在廉价的复印纸上的，上面有几个划掉的地方， 就好像作者一直在为他想说的话而苦苦挣扎。