He knew they could not help him.

他知道他们也爱莫能助。

youdao

After his wife left him he felt that he was in a lonely no man's land where even his friends could not help him.

自从他妻子离开他以后，他就感到自己孤寂无着，连朋友都帮不了他的忙。

youdao

The only doctor in the town could not help him and his condition worsened daily. Finally, he could not even walk well.

当地惟一的医生对他的病症束手无策﹐他病得一天比一天严重﹐最后连行走都困难了。

youdao

Not many flight instruments existed that could help him find his way.

VOA: special.2009.03.18

That afternoon with the mobsters, Delacruz told Lagrimita that he could not help him.

NEWYORKER: Silver or Lead

When he returned to his homeland a few years later, however, the United States could not help him.

CNN: Former South Korean President Kim dies

For a long time, I felt like I had failed because I could not find any way to help him get better.

FORBES: The Single Greatest Secret of Leadership: 'Fail Up'