We are doing a weekly poll on the president, and clearly his popularity has declined.

我们正在对总统进行每周一次的民意测验，很显然他的受欢迎度已经下降了。

《柯林斯英汉双解大词典》

For example, sleep duration has declined from some 8 hours in the 1950s to 7 in recent years.

例如，睡眠时间从20世纪50年代的8小时左右下降到近年来的7小时。

youdao

Although the service sector has grown since the late 1970's, its productivity growth has declined.

尽管服务业自20世纪70年代末以来一直在增长，但其生产率增长却在下降。

youdao

But that is changing. In the past decade the number of cyclos on the city's streets has declined sharply.

VOA: standard.2010.06.14

The pace of job losses has declined dramatically in the last year, but nearly 15 million Americans are still out of work.

VOA: standard.2010.03.02

The number of single mothers has increased. The salary for young fathers has declined with the economic downturn.

VOA: standard.2010.02.25

On the whole, however, Rubio has declined to tumble in the mud with Trump.

CNN: Donald Trump hits Marco Rubio on immigration - CNNPolitics.com

Despite more vigorous policing, the number of people caught trying to cross has declined markedly.

ECONOMIST: Immigration politics

The pace of strikes under Mr. Obama, however, has declined sharply over the past two years.

WSJ: Obama Narrows Scope of Counterterrorism Fight