睡眠不足的英文：
inadequate sleep ;the lack of sleep

参考例句：

My head aches for want of sleep
我因为睡眠不足

Stress and lack of sleep can aggravate the situation.
压力和睡眠不足会使情况恶化。

One of the difficulties attendant on shift work is lack of sleep.
轮班工作制带来的困难之一是睡眠不足。

Among that age group, people with young children and managerial jobs were most likely to suffer.
在这一年龄群中，有孩子的管理工作者更容易遭受睡眠不足的折磨。

People sometimes drag through life because of a chronic sleep deficit.
人们有时因长期睡眠不足而疲疲塌塌地度过一生。

Half of all bosses say a lack of sleep makes them irritable and prone to shouting at their staff, a study says.
一项调查结果显示，英国有一半的老板或上司认为睡眠不足使他们变得急躁易怒，容易对员工或下属发火。

inadequate是什么意思：
adj. 不充足的，不适当的；不够格的；不能胜任的

The pathogenesis of bluetongue is inadequately understood
人们对蓝舌病的发病机制还不完全了解。

The pathogenesis of bluetongue is inadequately understood.
人们对蓝舌病的发病机制还不完全了解。

He has made an inadequate choice.
他做了一个不适当的选择。

sleep是什么意思：
v. 睡觉；为…提供床位；提供住宿
n. 睡眠，睡觉

sleep treatment
睡眠治疗法

Finally she drifted into sleep.
最后她不知不觉地睡着了。

Do you have a strange sleep habit?
你睡觉时有奇怪的嗜好吗？

lack是什么意思：
n. 缺乏，不足
v. 缺乏，不足，没有

They lacked for nothing.
他们什么都不缺少。

lacking in impressiveness.
缺少令人难忘的特点。

People do not lack strength; they lack will
人们不缺力量,缺的是决心