study-aid

基本解释

As a study aid, it is convenient, inexpensive and almost omniscient.
作为学者的助手，辞典方便、便宜，几乎无所不有。
The examples in the study aid were not being utilized by the students.
学习辅导中的例题没有被学生充分利用。
There is a mini literature (not to say mythology) surrounding the use of Ritalin as a study aid by high school and college students.
譬如有少数的相关文献，提到高中、大学生以利他灵当做读书辅助剂的情况。
Both medications are common currency on college campuses, used as "study aids" to sharpen performance and wakefulness.
这两种药物在大学校园广泛接受。它们被称之为“学习辅助品”来提高表现和清醒度。
Small enough to wear on a necklace, this "digital backpack" can hold textbooks, novels, plays, study aids, the dictionary, graphing-calculator software -- almost anything, really.
这种小到可以挂在项链上的"数字书包"可以装下课本、小说、剧本、辅导资料、字典、曲线计算软件--几乎所有的东西,真的!