Lectures, seminars and tutorials are all one hour in length, whilst laboratory classes usually last either 2 or 3 hours.

讲座、研讨会和辅导课都是一个小时，而实验课通常持续2到3个小时。

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The book is an expansion of a series of lectures given last year.

本书是去年举行的系列讲座的扩充。

《牛津词典》

The basic problem is that it takes a long time to develop a new sequence of lectures and very little time to give last year's lectures, so things change only slowly.

最根本的问题是，开发一种新授课顺序需要花费很长时间，上一年度的授课时间会变得非常少，因此，这种变化只能缓慢进行。

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So that is an aspect of our sequence of lectures, beginning with the last one, that will be postponed until next week.

以上是我们讲座的顺序，上面提到的这种关系我们下周会讲到。

耶鲁公开课 - 文学理论导论课程节选

So, over the last few lectures we've worked and struggled so formulate the second and third laws of thermodynamics in addition to the first.

在前几次课中,我们通过努力明确的,给出了热力学,第一，第二和第三定律。

麻省理工公开课 - 热力学与动力学课程节选

What have we done over the last three or four lectures? We've started introducing you to classes of algorithms. Things that I'd like you to be able to see are how to do some simple complexity analysis.

我们在过去三节或四节课中讲了什么？,我开始向你们,介绍算法的类型,我想你们知道的是,如何做一些简单的复杂度分析。

麻省理工公开课 - 计算机科学及编程导论课程节选

Finally, whenever I talk about specific pharmacologic treatments I need to disclose that in addition to my academic work I have given lectures for two pharmaceutical companies in the last year: Lilly and Wyeth.

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The doom-laden lectures from the Americans and others in Washington last week did achieve something: Europe's policymakers now recognise that more must be done.

ECONOMIST: The world economy

Last week, the American Psychiatric Association decided to phase out drug-company sponsored lectures and meals at its annual meeting.

FORBES: ACC Conference