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上升

The crime rate went up.

犯罪率上升了。

The percentage of people traveling to work by bus rose gradually.

坐公交上班的人数百分比逐渐上升。

There was a gradual rise in the percentage of people traveling to work by bus.

在坐公交上班的人数百分比上有逐渐上升的趋势。

*正式写作多用名词。

There was a dramatic increase in the number of cars sold between March and May.

在三月到五月间，车的销量上有巨大的增长。

Sales of cars increased dramatically between March and May.

As cases surge across North Texas, officials urge residents to wear masks in public and practice social distancing.

随着北德克萨斯州的病例激增，政府强烈要求居民在公共场合带口罩并保持社交距离。

下降

The crime rate went down. 

犯罪率下降了。

The animal's numbers are declining rapidly.

动物的数量正在迅速下降。

The price of oil dropped steadily towards the end of the year.

趋近年底，油的价格稳步下降。

Sales decreased by five percent this year.

今年销量下降了百分之五。

Demographers project the number of Michigan high school graduates will plummet by nearly 30% from 2008 to 2030.

人口统计学家预计，从2008年到2030年，密歇根州高中毕业生的数量将会骤降将近30%

保持稳定

The number of people moving to the city remained steady during the period.

在这一期间，搬去城市的人口数量保持稳定。

But in much of the rest of the country, cases have either plateaued or are still rising.

但是在全国其余地区，病例要么达到平稳状态，要么还在增加。

异常波动

In the desert, the temperature fluctuates wildly.

在沙漠中，气温波动很大。

*数据也是有时态的。