he is lacking in courage to overcome the difficulties.句子正确吗？

句子正确.

be lacking in
adj. 缺乏(缺少)

此句或者这么说：

He lacks the courage to overcome the difficulties.

对
看如下词典的例句
1. She's not lacking in intelligence.
她并不缺乏学识。
2. He is not lacking in wisdom.
他并不缺乏聪明才智。

he lacks courage to ...