built-in
/ˈbɪltˈɪn/adjective
1- forming an integral part of a structure内置的, 嵌在…内的：
a worktop with a built-in cooker.
内嵌煤气灶的工作台。
1.1
- (of a characteristic) inherent; innate（特性）固有的, 与生俱来的：
the system has a built-in resistance to change.
这个体制本身固有一种拒绝改变的特性。