integral
adjective uk/ˈɪn.tɪ.ɡrəl/ us/ˈɪn.t̬ə.ɡrəl/
C1 构成整体所必需的
necessary and important as a part of a whole
He's an integral part of the team and we can't do without him. 他是球队不可缺少的一员，没有他我们可不行。
Bars and terrace cafés are integral to the social life of the city. 酒吧和露天咖啡座是这个城市社交生活不可缺少的一部分。
UK内置的
contained within something; not separate
All rooms have a flat-screen TV with integral DVD-player. 所有房间都装有内置DVD播放机的平板电视。
The integral garage had been converted to make another bedroom. 内置车库被改造成了另一个卧室。