prep. 在…之前;先于,优于;当着…的面;与其…;
conj. 在…之前;在…以前;比…早些;与其…;
adv. 先前,从前;在前,在前方;
例句:
1、
2、
3、
Before trying to tackle his homework he read up the notes he had taken at the lecture.
他把课堂上记的笔记认真看过后才动手做作业.
《简明英汉词典》https://dict.jiandongshicai.cn/
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