My first stop is an encampment with wooden and concrete structures.

我的第一站是一个木结构和混凝土结构的营地。

Now, on their own, concrete structures like this are actually effective breakwaters.

就其本身而言，像这样的混凝土结构实际上是有效的防波堤。

Starting around 200 BCE, the Roman Empire was building concrete structures that have stood the test of time.

从公元前200年左右开始，罗马帝国开始建造混凝土建筑，而这些建筑经受住了时间的考验。

How do concrete structures stay put?

混凝土结构如何保持原状？

Modern concrete structures generally last perhaps 150 years, at best.

现代混凝土结构一般最多只能持续 150 年。

So, if you don't want the lightning to get to you, avoid standing next to concrete structures or leaning on them.

所以如果你也不想让闪电接近你，避免站在混凝土结构旁边或靠在混凝土结构上。

Workers will also plant trees and build  concrete structures resistant to saltwater.

工人们还将植树并建造抗盐水的混凝土结构。

More frequent replacements of concrete structures means more releases of this greenhouse gas.

更频繁地更换混凝土结构意味着更多的温室气体排放。

Physical malls with their concrete structures are increasingly overshadowed by sprawling online marketplaces that inhabit the cloud.

拥有具体结构的实体购物中心越来越被云端庞大的在线市场所掩盖。

Like many metro lines, it runs underground in the center of the city and runs above ground on concrete structures in surrounding areas.

和许多地铁线路一样，该线路在市中心地下和周围地区的混凝土结构上运行。

Never Touch Concrete Structures. The problem with concrete floors, walls, and buildings is that they often have metal bars or wires going through them.

切勿触摸混凝土结构。这个问题在于，墙壁和建筑物内常常埋有金属条或电线。

This might be more expensive than  using a traditional concrete structure, but the goal is to make it  quick and easy to deploy.

这可能比使用传统的混凝土结构更昂贵，但目标是使其快速且易于部署。

Shenzhen is now left with some massive concrete structures that are nearing the end of their relatively short lifespans and there's only two options left: demolition or regeneration.

现在，深圳留下了一些大型混凝土建筑，它们的寿命相对较短，已接近尾声，只剩下两种选择：拆除或重建。

If the headcuts were  to reach the concrete structure upstream, it would almost certainly fail, releasing  a wall of water from Oroville Lake that would devastate downstream communities.

如果头部切口到达上游的混凝土结构，几乎肯定会失败， 从奥罗维尔湖释放出一道水墙， 从而摧毁下游社区。

We were able to salvage 80% of the original concrete structure, which amounts to approximately 24,000 cubic metres. As Shenzhen continues to expand there isn't room for these old buildings to sit there and become disused.

我们抢救出了 80% 的原有混凝土结构，约 24,000 立方米。随着深圳的不断扩容，这些老旧建筑已经没有被闲置的空间了。

If I break that down by a kind of material and an example of concrete, for instance, is the pantheon in Rome that's almost 2000 years old now, and that's the oldest concrete structure in the world.

如果我用一种材料和一个混凝土的例子来分解的话，例如，罗马万神殿已有近 2000 年的历史，是世界上最古老的混凝土建筑。

Now the supply chain's there, we know if we want to make a huge concrete structure we can get enough graphene of the right grade to use for that structure and that's been one of the big drivers I think.

现在供应链就在那里，我们知道如果我们想制造一个巨大的混凝土结构，我们可以获得足够的合适等级的石墨烯用于该结构，我认为这是主要驱动力之一。