会谈的主题提前一周宣布。
学生通常需要提前为研讨会和辅导课准备工作，这可以采取研究讨论主题、写论文或解决问题的形式。
Students are normally expected to prepare work in advance for seminars and tutorials and this can take the form of researching a topic for discussion, by writing essays or by solving problems.
演讲的主题已经提前一个星期宣布了，但主讲人的名字却没有宣布。
The topic of the speech is announced a week in advance, but the name of the speaker is not.
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