Even if early man could not see virus or bacteria, he was confronted with their lethal impact.
即使早期人类无法见到病毒或细菌，也面临着其致命影响。
If early humans hadn't moved and intermingled as much as they did, they probably would have continued to evolve into different species.
如果早期人类没有像以前那样频繁地移动和融合，他们可能会继续进化成不同的物种。
If early engineering phases are overconstrained, development organizations will set up intermediate checkpoints that are less ambitious.
如果早期工程阶段受到过分限制，开发组织建立的中间检查点将不会那么有抱负。
If early oceans carried organic molecules-and they most likely did-the porous surfaces of shoreline minerals could have helped organize such building blocks into primitive structures.
如果早期的海洋内含有有机分子，而这也是非常可能的，海岸线上矿物质的疏松表面可以帮助这些有机分子有机构建成原始的结构。
If early oceans carried organic molecules-and they most likely did-the porous surfaces of shoreline minerals could have helped organize such building blocks into primitive structures.
如果早期的海洋内含有有机分子，而这也是非常可能的，海岸线上矿物质的疏松表面可以帮助这些有机分子有机构建成原始的结构。
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