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"Be prepared before class" 就是在课前做好准备的意思。来源：这个短语来源于英语成语 "be prepared"，意思是做好准备。
例句：
Be sure to read the chapter before class so you can be prepared to discuss it.
(课前一定要读过那一章，这样才能做好讨论的准备。)
I always try to be prepared before class so that I can answer any questions the teacher may have.
(我总是在课前做好准备，这样我就能回答老师的任何问题。)
She always comes to class prepared and organized, which helps her to do well in her studies.
(她总是在课前做好准备并且有条理，这有助于她学习成绩优秀。)
来源：作文地带整理
