The first synthetic plastic – that's plastic made entirely from man-made materials - was created over 100 years ago.

第一种合成塑料，即完全由人造材料制成的塑料，是在100多年前被制造出来的。

And earlier I asked you what was the name of the first synthetic plastic, invented over a 100 years ago.

之前我问你100年前被制造出来的第一个人造塑料的品牌名称是什么。

Celluloid was the most successful early, synthetic plastic.

赛璐珞是早期最成功的合成塑料。

Synthetic plastic, the kind made by people, has been around since 1907, and scientists estimate that almost every piece of it made since then still exists.

这种人造的塑料从1907年开始生产，科学家估计当年产的塑料现在可能还没消失。

It is made from a blend of crushed rock, rubber and polyurethane, a synthetic plastic that replaces bitumen as the binding agent and allows even bigger pores in the road surface.

它由碎石、橡胶和聚氨酯制成，人造塑胶聚氨酯可以代替沥青，因为这种粘合剂可以允许更大的气孔存在于路面。

Most balloons used in aerospace applications (to conduct high-altitude monitoring, for example, or for communications) are produced with synthetic plastics and filled with helium, which is becoming scarce on Earth.

大多数用于航空航天应用（例如进行高空监测或用于通信）的气球都是用合成塑料制成，并充满氦气，而氦气在地球上正变得越来越稀缺。