shortcoming

该计划的一个主要缺点是缺乏细节。

One major ___shortcoming of the plan is its lack of detail.

我们必须解决系统的缺点以提高效率。

We must address the system's ___shortcoming to improve efficiency.

他最大的缺点是做事不够细心。

His biggest ___shortcoming is not being careful enough in his work.