英语
西班牙语
英语
西班牙语
西班牙语
英语
单语范例（未经PONS编辑处理）
Over the course of the twentieth century, hospital leaders were on forefront of treatments like occupational therapy and shock treatment.
en.wikipedia.org He stood strong in the forefront of student movement, many a time unwilling to compromise on his principles.
en.wikipedia.org This theme is brought to the forefront in the first letter of the novel.
en.wikipedia.org In the former, she has been on the forefront of research in the field of elites.
en.wikipedia.org It is at the forefront of research in science and engineering.
en.wikipedia.org