These fossils were deposited in a river system.

这些化石堆积在一个河流底部的淤泥中。

This has sent a shock through the whole river system.

这影响了整个湄公河水系。

But dams have changed the path of the river system.

但一些水坝的存在导致湄公河水系的路径发生了改变。

Scientists believe Jezero Crater contains the remains of an ancient river system.

科学家们认为，杰泽尔陨石坑包含了一个古老的河流系统的遗迹。

The river system, called a delta, rises more than 40 meters above the crater floor.

这条河系被称为三角洲，高出弧坑底部40多米。

The sheer scale of the Amazon river system is difficult to comprehend.

亚马逊河系统的规模之大令人很难理解。

Ceratosaurus was perfectly designed for hunting in the densely forested areas that surrounded the river systems.

角鼻龙的设计非常适合在水系周围的浓密森林里狩猎。

And when we release them they go out, and find the females in these huge river systems.

当我们释放它们的时候，它们就会出去，在这些巨大的河流系统中找到雌性。

The northwest, earlier than normal snow melt may stress summer water supplies in the river systems there.

西北地区, 早于正常季节的融雪可能会让夏季的河流水供应系统面临压力。

The Balkans is one of the few areas of Europe where free flowing natural river systems still exist.

巴尔干半岛是欧洲少数几个仍留存着自由流动的天然河流系统的地区之一。

Officials say an 11th atmospheric river system, forecast for Monday could send more water rushing through the still breached levee.

官员们表示，预计下周一将出现第11个大气河流系统，可能会使更多的水涌入仍然被破坏的堤坝。

Fleets of them could land on open beaches, penetrate deep into river systems, and be moved overland if need be.

船队可以在开阔海滩上登陆、 也可以深入到河流系统，如果需要的话，还可以运到陆地上。

Which is calcium carbonate that is present throughout the entire river system.

这是存在于整个河流系统中的碳酸钙。

But we are the first people to document these river systems.

但我们是第一批记录这些河流系统的人。

Now, along with lakes, there was also a whole river system across the Sahara.

现在，除了湖泊之外，整个撒哈拉沙漠还有一个完整的 河流系统。

The issue is in our own backyard. We figured we have a good source of protein with our own river system.

问题出在我们的后院。我们发现自己的河流系统中有很好的蛋白质来源。

Prey species in the river system had to contend with attacks from all sides, including from above.

河流系统中的猎物必须应对来自四面八方的攻击，包括来自上方的攻击。

After the spill leaked millions of hazardous mine waste into the river system, this was it later that day.

在泄漏将数百万危险的矿山废物泄漏到河流系统之后，当天晚些时候就是这样。

The Ganges is among 10 river systems that researchers say are responsible for transporting 90% of plastic pollution into the world’s oceans.

研究人员说，世界上有10个河流系统应对每年百分之九十被运送到世界各地的塑料废物负责，恒河即为其中一个。

Explorer Steve Boyes has embarked on a series of expeditions to discover and protect these river systems and the wildlife that depends on them.

探险家史蒂夫·博伊斯开启了一系列探险活动，就是为了去发现并保护这些河流系统以及赖以生存的野生动物。