She completely mishandled an important project purely through lack of attention.

她纯粹由于不用心，把一件重要项目完全搞砸了。

I feel where there is inattention, lack of attention.

我发现，当漫不经心时，缺乏关注。

I've often felt that same lack of attention from my father.

我也常常会有那种缺少父亲关心的感觉。

The cause is lack of attention on the designer's part.

导致这个情况的原因是设计时考虑的不够周全。

Your work is characterized by lack of attention to detail.

你工作的特点是缺乏对细节的关注。