In the past, doing the timetabling was quite simple but now we have a lot more courses and what's made it complicated is that many of them have options.

在过去，做时间表是很简单的，但现在我们有更多的课程，让这个过程变得复杂的是，当中许多课程还有不同选择。

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For the past decade or so, practical courses, such as computer and business, have gained tremendous popularity on college campuses.

过去十年来，实用性课程诸如电脑和商科在大学中普遍盛行。

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However, the ban has been violated and hundreds of new golf courses have emerged during the past seven years.

然而这项禁令被破坏，在过去7年有数百个高尔夫球场涌现。

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For several of the past few years, more courses have closed than opened in this country.

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It began introducing new courses over the past few years.

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Nearby Canyon Ranch boasts no obstacle courses, but over the past 25 years has also seen a steady uptick in its return clientele.

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