His long absence raised fears about his safety.
What was the real reason for your absence?
We are in the absence of experience.
We must invent an excuse for our absence.
Please look after my house during my absence.
1. 不在, 缺席[U][C][(+from)]
She never speaks ill of anyone in his or her absence.
2. 缺少, 缺乏[U][(+of)]
The absence of color in that drawing makes it dull.
absence of mind
He failed in the exam because of his absence of mind.