这家铁路公司人员超编，且出了名地没有效率。

The train company is overstaffed and notoriously inefficient.

《柯林斯英汉双解大词典》

他是位有善意却没有效率的领导。

He is a well-meaning but ineffectual leader.

《柯林斯英汉双解大词典》

哈福德认为，一些不可避免的干扰往往会让日常待办事项列表变得没有效率，而在这样的列表中留出即兴发挥的空间可以收获最佳效果。

Harford argues that inevitable distractions often tender the daily to-do list ineffective, while leaving room for improvisation in such a list can reap the best results.

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Whether they're more inefficient when things are going up or when things are going down.

是不是在事情进展顺利或受阻的时候,市场会更没有效率。

耶鲁公开课 - 金融市场课程节选

If I were starting a new company, I would look for some large, fast-growing industry that was inefficient, and was not keeping pace with the changes that are possible.

要是开一家新公司的话，我会找一些大的，发展迅速但是效率较低的，没有跟上,变化的行业。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

I think they're working too little here compared to what's efficient.

我认为他们没有达到最优效率

耶鲁公开课 - 博弈论课程节选