The attributes of an object are either primitive types or references to other objects.

对象的属性可以是基元类型，也可以是对其他对象的引用。

youdao

They have such natural, primitive instincts - either love, or food.

BBC: Wicket the owl with owner Kate Harris

Whatever the cause, this "urbanization of poverty" has resulted in the large-scale erection of primitive forms of shelter, either on public land or on private land owned by absentee landlords.

FORBES: Magazine Article