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But the most successful type of flowering plant
最成功的开花植物
is one that makes up 20% of all plant life on the planet.
是占全世界植物百分之二十的
Grass.
禾本科植物
There are 10,000 different species.
世上共有一万种 不同的禾本科植物
Today, they form the diet of many thousands of different animals.
禾本科植物 是数千种动物的食物来源
And a few grasses, particularly rich in nutrients,
而且有几种 营养特别丰富的禾本科植物
have developed a relationship with one animal
与某种动物建立了密切的关系
and together, the two have changed the world.
并共同改变了世界
10,000 years ago, we humans started to cultivate rice
人类在一万年前开始种植稻子
in order to harvest its food-rich seeds.
以收成其营养丰富的种子
Now, half of the world's population depends on it.
如今世上有半数人口以米为主食
But there is one other grass that has spread even further across the planet
但还有一种植物 因为与人类的关系
due to its relationship with humans...
在地球上的分布范围更广
