未能

wèi néng shí xiàn

未能实现

fail to materialize

wèi néng àn qī wán chéng

未能按期完成

fail to complete as scheduled

wèi néng dá dào mù biāo

未能达到目标

fail to achieve one's goal

tā wèi néng lái

他未能来。

He has not been able to come.

wèi néng zhuā zhù jī huì

未能抓住机会

fail to exploit the opportunities

wèi néng tí gōng cái liào

未能提供材料

fail to provide materials