The quest is without end, it's even without direction.

这一追寻没有止境，甚至没有方向。

耶鲁公开课 - 现代诗歌课程节选

And how far can Barbara go to help a friendless young patient (Jasna Fritzi Bauer) without risking her own quest for liberty?

NEWYORKER: Barbara

Scientists have implanted a laboratory-made windpipe into a toddler who was born without one, the latest advance in the quest to grow viable human organs in the lab.

WSJ: Scientists Implant Lab-Made Trachea Into Toddler

Melhuish, who is director of the Intelligent Autonomous Systems Lab at the UWE, told CNN that the EcoBot II was a result of a quest for an intelligent robot that could function without human supervision.

CNN: Fly-eating robot powers itself