最后运用趋势方程及周期规律，对未来5年西安市境外旅游业的发展趋势进行了预测。

Finally, the trend equations and cycle laws was applied to predict the developing trend for next 5 years.

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本文通过对经济周期规律的分析，提出了对矿产品营销价格定位的策略，并对矿产品的推销提出了相应的对策。

The paper gives the tactics for setting a price of the mineral product based on analysis to the law of economic cycle and also give some countermeasures for sale of the mineral product.

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在对华北地区降水100年资料的分析过程中，运用不同的时间尺度分别得到6 ~ 7年、21 ~ 22年和35 ~ 36年的时间周期规律。

From the 100 years data, approximate 6-7 years, 21-22 years and 35-36 years periods are found respectively.

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if we think about electronegativity as a periodic trend we can just draw our nice periodic table here, and let's separate it into quadrants.

如果我们来思考一下电负性的周期性规律,我们可以把我们漂亮的周期表画在这，然后把它分成四个象限。

麻省理工公开课 - 化学原理课程节选

We'll then take a turn to talking about the periodic table, we'll look at a bunch of periodic trends, including ionization energy, electron affinity, electronegativity and atomic radius.

然后我们再开始讲元素周期表，我们会看到很多周期性规律，比如电离能，电子亲和能，电负性以及原子半径。

麻省理工公开课 - 化学原理课程节选

And there's a lot we can explain by talking about what we see in the periodic table in terms of what different trends are in grouping different elements in different spots within the periodic table.

我们可以解释很多,通过讨论元素,周期表中的内容,按照各种不同的规律,将周期表中不同位置的元素分组归类。

麻省理工公开课 - 化学原理课程节选