有些事情既然已成定局，那我们只好无奈接受。

Yǒuxiē shìqing jìrán yǐ chéng dìngjú, nà wǒmen zhǐhǎo wúnài jiēshòu.

Since some things are already set in stone, we can only accept them helplessly.

我很感激他的无奈帮助。

Wǒ hěn gǎnjī tā de wúnài bāngzhù.

I am very grateful for his helpless help.

面对困境，我们只能无奈地接受。

Miàn duì kùnjìng, wǒmen zhǐnéng wúnài de jiēshòu.

Faced with difficulties, we can only accept it helplessly.