大学期间，我确保参加了所有提供的研讨会。

During my university years, I made sure to attend every ___seminar on offer.

李博士这周五将举办一场关于人工智能的研讨会。

Dr. Lee is giving a ___seminar on artificial intelligence this Friday.

许多专业人士自费参加相关的研讨会以促进职业发展。

Many professionals use their own funds to attend relevant ___seminars for career development.