Well, apparently back in the 1950s they built channels to drain away the water in case of flooding.

好的，在1950年的时候，他们建造了水渠将水抽干以防洪涝灾害。

So they built the drainage channels too close to sea level, and now sea levels are rising, they're more or less useless.

所以他们建造的排水水渠离海平面太近了，现在海平面在上升，他们或多或少地失去了作用。

This meant that at these points if a ship got stuck, it could be bypassed by other ships using the newly built adjacent channels.

这意味着，如果一艘船在这些地方被困住了，它可以被其他船只绕过，使用新建的相邻航道。

We further damage the Earth by building new channels in the sea and factories on the land, and by creating pollution with chemical waste.

通过在海底建隧道、在陆地上建工厂以及化学废物造成的污染，我们更进一步地破坏了地球。

And we are just so grateful to all of you and all of your support over the last few years in building this channel.

我们非常感谢你们所有人以及你们在过去几年中为建立这个频道所提供的所有支持。

In the 1920s, after the San Antonio River flooded downtown, the city decided to divert the river and build a covered storm channel through town instead.

1920 年代， 在圣安东尼奥河淹没市中心后，该市决定改道，改建一条穿过城镇的有盖风暴通道。

You see, when ancient peoples built irrigation channels, they built them so that the water from a lake or stream could flow down to a low line area where crops could be grown.

你看，当古代人建造灌溉渠道时，他们建造它们是为了让湖泊或溪流的水可以流到可以种植农作物的低线地区。