The greater part of these bore impressions of primitive organisms.

其中大部分带有原始生物的印象。

This oxygen, released in great quantities into the atmosphere wreaked havoc on other primitive organisms, leaving the field clear for the cyanobacteria.

这种大量释放到大气中的氧气对其他原始生物体造成了破坏，为蓝藻细菌留下了广阔的繁殖空间。