The constant phone notifications were the biggest distraction while I was working.

distraction 是名词，由动词 distract（分散注意力）加上后缀 -tion 构成，表示"使人分心的事物或干扰"。前缀 dis- 表示"分离、分开"，词根 tract 来自拉丁语，意思是"拉、拖"，所以 distract 字面意思是"把注意力拉走"，distraction 就是"使人注意力分散的事物"。