But using such plastic as a replacement for bitumen is cost-effective, claims Mr McCartney.

但是使用这种塑料作为沥青的替代品是很合算的，麦卡特尼说。

Here is the Standard of Ur where mosaic inlaid in bitumen showed the scenes that mattered most.

这是乌尔军旗沥青上镶嵌的马赛克图案展现了当时最为重要的场景。

The process of heating and separating bitumen from the sand requires millions of cubic meters of water.

加热沙子和从中分离沥青的过程需要数百万立方米的水。

The rubberised bitumen itself is flexible and slightly springy, which enables it to absorb more unwanted sonic energy.

而参入了橡胶的沥青本身也具有柔韧性和轻微的弹性，这可以使它吸收更多讨厌的音波能量。

At present 5-10% of the bitumen is replaced by the additives, but this could be increased to 25%.

目前，5-10%的沥青被添加剂替代，但这个比例可增加至25%。

As an example, he says that a tonne of bitumen might cost around 400 pounds ($521) in Britain.

例如，他说一公吨沥青在英国的成本约为400英镑（521美元）。

An alternative method of using recycled plastic is to mix the material into hot bitumen when making asphalt.

使用回收塑料的另一种替代方法是在制作柏油时，将材料混合进热沥青中。

The additive would replace a proportion of the bitumen, so there are savings to be made.

添加剂可替代部分沥青，因此可以有所节省。

There is a connection. Just as plastic is derived from petrochemicals, bitumen is produced as a by-product of refining oil.

其中有一个联系。塑料源自石油化工产品，而生产出的沥青是精炼油脂的副产品。

As this thick bitumen is found near the earth's surface, forests are razed to extract the oil.

由于这种厚厚的沥青位于地表附近， 因此人们砍伐森林来开采石油。