That number has been declining steadily since the 1950s.

这个数量自从1950就开始下降。

Revenues are declining at all three networks.

三个公司的总收入都在下降。

These birds have been declining a lot recently.

这些企鹅的数量最近下降了很多。

Over recent years they haven't yet declined.

近来也没有下降。

The flying insects that swifts eat also appear to be declining.

雨燕捕食的飞虫似乎也在减少。

Global production has been declining since 2004 while consumption has risen.

全球产量自2004开始下降，而消费量却在上升。

People would see that, oh, the health of the grass is declining.

人们会看到，哦，草原的环境每况愈下。

And they're showing that the antibody levels are declining over time.

他们表明抗体水平随着时间的推移而下降。

And though print ad sales still dwarf their online and mobile counterparts, revenue from print is still declining.

管纸质版报纸的广告销售额仍让在线和移动报纸相形见绌，但是纸质版报纸的收入仍在下滑。

But her health, it was declining.

但她的健康状况每况愈下。

And you could see more substantive price declines.

你可能看到更多实质性的价格下降。

Why then is their importance declining?

那他们的重要性怎么还会下降呢？

But there are two clues that tell you that she is declining my invitation.

但是，有两点暗示了她在婉拒我的邀请。

Conservation experts say that jaguar populations are declining across their range from Mexico to Argentina.

保护专家表示，墨西哥到阿根廷的境内，美洲豹的数量在不断减少。

Repeat testing helps scientists track any decline.

重复检测帮助科家追踪任何指标的衰退情况。

Karl Marx wrote in the 1830s and 1840s about how workers' wages were declining.

卡尔·马克思在十九世纪三四十代写过工人们的薪水如何缩水。

And that's what we're actually seeing in places like California where kelp forests are declining.

这就是我们在加州等地所看到的，那里的海藻林正在减少。

He was 81 and in declining health.

他当时已经81岁，健康状况每况日下。

There's been about a 75% decline since the start of February.

自2初以来已经下降了75%。

It has been declining steadily since.

从此就开始逐下降。