She was not lacking in courage.

她并不缺乏勇气。

She's not usually lacking in confidence.

她平时并不缺乏自信心。

My skin feels tight and lacking in moisture.

我的皮肤感觉紧巴巴的，缺乏水分。

I feel there is something lacking in my life.

我觉得我的生活中缺少点什么。

The book is completely lacking in originality.

这部书完全没有创意。