coming from within a thing itself rather than from outside it 本身的；自身的
a theory which lacks internal consistency (= whose parts are not in agreement with each other)
自相矛盾的理论
Some photos contain internal evidence (= fashions, transport, etc.) that may help to date them.
有些照片自身就含有确定拍摄日期的佐证。
happening or existing in your mind 内心的；头脑中的 SYN inner
internal rage
内心的愤怒