形容词

1. 无效率的;无能的
Inefficient people, organizations, systems, or machines do not use time, energy, or other resources in the best way.

1. lacking the ability or skill to perform effectively
inadequate

e.g. an ineffective administration
inefficient workers

Synonym: ineffective

2. not producing desired results
wasteful

e.g. an inefficient campaign against drugs
outdated and inefficient design and methods