den

(FOR ANIMALS) the home of particular types of wild animal
(ROOM) a room in a house or apartment, used for activities not involving work
(FOR CHILDREN) a rough structure, usually built outside from pieces of wood, cardboard, etc., in which children play
(CRIME) a place where people secretly plan or take part in dishonest or illegal activities

A den is the home of certain types of wild animals such as lions or foxes.
Your den is a quiet room in your house where you can go to study, work, or relax without being disturbed.
A den is a secret place where people meet, usually for a dishonest purpose.
If you describe a place as a den of a particular type of bad or illegal behaviour, you mean that a lot of that type of behaviour goes on there.

專業(yè)釋義

洞穴
Microclimate factor class factor is the chief factor in den site selection. Better sheltering class and keeping away from human disturbance is common requirement of three species of canids.
影響沙狐春季洞穴選擇的前三位主要因子是微氣候、人爲(wèi)乾擾和食物。
物理學(xué)
巢穴