This work exacts the closest attention and care.

这项工作要求高度专心和细心。

Gill was intent on her gardening magazine.

吉尔专心于她园艺杂志。

An inattentive pupil is unnecessarily an unclever boy or a girl.

专心学生就是个孩子。

She is devoted to her studies.

她专心于她学习 。