/'ɪntɪgrəl; `ɪntəˇrəl/
adj
1 ~ (to sth) necessary for completeness 构成整体所必需的
*The arms and legs are integral parts of the human body; they are integral to the human body. 手臂和腿是人体的组成部分, 是构成完整的人体必不可少的.
2 [usu attrib 通常作定语] having or containing all parts that are necessary for completeness; whole 具备构成整体所必需的所有部分的; 完整的
*an integral design 完整的设计.
3 [usu attrib 通常作定语] included as part of the whole, rather than supplied from outside 作为整体的一部分的（并非来自外部的）
*a machine with an integral power source 有内置电源的机器.
4 (mathematics 数) of or being an integer; made up of integers 整数的; 由整数组成的; 积分的.

adj
forming a necessary part of something
　Vegetables are an integral part of our diet.
integral to
　Statistics are integral to medical research.
[usually before noun]
provided as part of something, rather than being separate
　a TV and integral video recorder
>integrallyadv