Meaning of míng míng:
明明
obviously; plainly; undoubtedly; definitely
Tā míngmíng shuō guò huì lái de.
他明明说过会来的。
He obviously said he would come.
Tā míngmíng zhīdào, dàn què bù shuō.
他明明知道,但却不说。
He plainly knows, but he doesn't say.
Tā míngmíng gàosu guò nǐ shíjiān, nǐ zěnme hái chídàole?
他明明告诉过你时间,你怎么还迟到了?
He undoubtedly told you the time, so how did you still arrive late?
Zhè jiàn shì míng míng bù yīng gāi fā shēng.
这件事明明不应该发生。
This matter definitely should not have happened.