这位心不在焉的司机没注意到红灯已经亮了。

The ___unobservant driver failed to notice the red light had turned on.

虽然来自一个虔诚的家庭，但他对斋戒仪式表现得不太重视。

Though from a devout family, he was surprisingly ___unobservant about the fasting rituals.