built-in 的英语意思
built-inˌbuilt-ˈin adjective 
查看全部语言翻译 forming a part of something that cannot be separated from it构成某物不可分割的组成部分: 
a built-in microphone内置麦克风
查看全部语言翻译 forming a part of something that cannot be separated from it构成某物不可分割的组成部分: a built-in microphone内置麦克风