The arrival of predation was a seismic shift in the ancient seas. 捕食者的出现 是古代海洋中的一次颠覆性转变
It's adapted to a life of predation. 它适应了掠食的生活
And its sluggish nature hides a sinister side... 它缓慢的本性中 隐藏着邪恶的一面
It may seem like these shallows are a kind of Eden, 这些浅海看起来可能像是伊甸园
it's still possible to get a glimpse of what that next wave of life was like. 我们依然可以一窥 之后一波生命浪潮的模样
No longer hostile, Earth became a new world, 地球不再充满敌意 而是成为了一个新的世界
One byproduct of photosynthesis is a gas, 光合作用的副产品之一是一种气体