她从职业生涯中退休，全身心投入到环保事业中。

She retired from her career to ___devote ___herself ___to environmental activism.

许多志愿者致力于帮助难民重建生活。

Many volunteers ___devote ___themselves ___to helping refugees rebuild their lives.

这位著名学者十多年来一直致力于研究这份古代手稿。

The renowned scholar has ___devoted ___himself ___to studying this ancient manuscript for over a decade.