Try as I may I could never explain.

试着解释我无法解释的。

youdao

Keynes, though, could never explain exactly what the mechanism was.

凯恩斯，不过，无法解释到底是什么机制。

youdao

She could hardly see, her eyes having filled with two blurring tears drawn forth by a grief which, to this her best friend and dear advocate, she could never explain.

她的眼睛几乎看不见了，悲伤给她的一双眼睛注满了泪水，模糊了她的视线； 对于她这位最好的朋友，她亲爱的辩护人，她是永远无法向他解释的。

youdao

He could never explain why he should be president.

ECONOMIST: Lexington

She could not explain how she knew this, never having seen the couple.

NEWYORKER: Temporary