Their devotion to their children is plain to see.他们对孩子的爱显而易见。

a way of life that demands total devotion需要全身心投入的生活方式

I don't mean to keep criticizing his devotion to his job.我并不是要一再批评他对工作的专注。

Of his Islamic devotion there was never any question.他对伊斯兰教的虔诚从来无可置疑。