[nèi bù]
interior; inside; inward; indoor; depth; viscera; bowel; internal
internal relations
内部联系
the domestic affairs of a country
国家内部事务
contradictions among the people
人民内部矛盾
inherent laws of a thing
事物的内部规律性
The easiest way to capture a fortress is from within.
堡垒是最容易从内部攻破的。