She devoted herself to her students with undivided concentration and energy. 她把全部的心思和精力都奉献给了自己的学生。

undivided attention/loyalty The issue of public health care is at last getting the government’ s undivided attention. 公众的医疗保健问题最后终于引起政府的全力关注。

an undivided nation 统一的国家