lack
欠缺───lack
His ideas lack depth.───他的想法缺乏深度。
Her eyes ached from lack of sleep.───她的眼睛因睡眠不足而隐隐作痛。
They were exhausted from lack of sleep.───他们因睡眠不足而疲惫不堪了。
The most striking single fact about chimpanzees is the flexibility of their social life, the lack of any rigid form of organization.───黑猩猩最突出的一个特征是它们社会生活的灵活性，即缺乏固定的组织形式。
Overall, I think there was a real lack of understanding of basic economic principles among the Occupiers.───总的来说，我觉得华尔街占领者们缺乏基本的经济常识。
Lack of it causes half a million children to go blind every year; half of them die within a year as their other organs fail.───维A的缺乏每年导致近50万儿童失明，其中一半的儿童因其他身体器官衰竭而死亡。
Lack of money necessitated a change of plan.
There is no lack of vegetable.
He felt faint for lack of food.
The leaves languished from lack of water.
She does not lack for friends.