study for的用法和样例：
例句
- It's difficult to study for a degree in Economics in evening classes while working during the day.
白天工作，仅晚上进夜校学习来获取经济学学位是不容易的。 - She shuts herself in her study for hours.
她一个人关在书房里一呆就是几个小时。 - A course of study for graduate and advanced undergraduate students in a college or university, conducted in the manner of a seminar.
大学研究生班大学里为研究生和高年级的本科生设的以研讨方式进行的研究班
