Brocks considers Dickinsonia to be the very oldest animal that we can be sure about.

布拉克认为狄更逊水母是我们可以确定的最古老的动物。

Brocks said scientists do not know much about what Dickinsonia looked like. But he said they do know it was soft and flexible.

布拉克表示，科学家不知道狄更逊水母长什么样子。但他说他们知道这种生物体质柔软，富有弹性。

Brocks said scientists do not know much about what Dickinsonia looked like. But he said they know it was " soft and flexible" .

布罗克斯说，科学家们对狄更逊水母的样子知之甚少。但他表示，他们知道它 " 柔软而灵活" 。