That number has been declining steadily since the 1950s.

这个数自从1950年就开始下降。

Revenues are declining at all three networks.

三个公司总收入都在下降。

These birds have been declining a lot recently.

这些企鹅数最近下降了很多。

Over recent years they haven't yet declined.

近年来也没有下降。

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

全球产自2004年开始下降，而却在上升。

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

人们会看到，哦，草原环境每况愈下。

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

们表明抗体水平随着时间推移而下降。

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

尽管纸质版报纸销售额仍让在线和移动报纸相形见绌，但是纸质版报纸收入仍在下滑。

But her health, it was declining.

但她健康状况每况愈下。

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邀请。

Why then is their importance declining?

那们重要性怎么还会下降呢？

Repeat testing helps scientists track any decline.

重复检测帮助科学家追踪任何指标衰退情况。

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年代写过工人们薪水如何缩水。

The Dow Jones Industrial Average endured its eighth biggest point decline ever on Monday.

周一，道琼斯工业平均指数创下第八大单日最大跌幅。

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，那里海藻林正在减少。

He was 81 and in declining health.

当时已经81岁，健康状况每况日下。

Previous treatments, Cohen says, had managed only to slow patients' decline.

科恩表示，之前治疗只成功地减缓了患者病情恶化。

It has been declining steadily since.

从此就开始逐年下降。

Are you looking for excuses to decline invitations?

在寻找拒绝邀请借口吗？

Even at best, the velocities flattened out with distance, when they should have declined.

即使在最好情况下，速度也会随着距离增加而趋于平稳，而此时速度应该会下降。