There is no other way (to solve the problem); there are no alternative means or options available.
緊急で病院に運ぶしかなく、他に方法がないと判断した。
I decided there was no other option but to rush them to the hospital.
もう時間がないので、他に方法がないなら計画を中止しよう。
We're out of time, so if there's no other way, let's cancel the plan.
この修理法が最善で、他に方法がないと専門家に言われた。
The expert told me this repair method was the best and that there was no other way.