[marciobarbalho]

I am not a teacher, just a learner, then I'd not go for a bilingual dictionary, I think it can dull your mind someway.
Well, it's just a point of view, I think that whether a student can't understand a sentence or even a word, he/she should guess, translations are not the best recommendation. Eventually he/she will find out the meaning, maybe listening to music, watching a movie, talking to friends, and suddenlly that word/sentence comes up, then, he/she get it easily.
If you can't wait... ask an English native speaker.