“There were many species in cages closely packed together,” says Yi.

“许多物种在笼子里紧紧挤在一起”，他说。

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This could explain why large numbers of species are packed together in the tropics, but it doesn't seem to hold consistently.

这就解释了为什么热带地区的生物总是聚集在一起，密度很大，但是这一理论并不能站住脚。

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His conclusion is that the main difference is in the structure of the small columns of nerve cells that are packed together to form the cerebral cortex.

她对自闭症患者和普通人尸体进行多年解剖，得出这样的结论：两者最主要的区别在于紧凑组成组成大脑皮层的神经元微柱结构。

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That constellation of risk factors that gets packed together tells you more in some cases about a person's risk for disease than if all you knew was their weight.

上述提到的一系列的风险因素,能告诉我们更多有关个人的患病风险,这比仅仅知道体重更能说明问题

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Instead, the characters are regularly packed together in small places a legal office, a dorm room or in big, loud impersonal places a nightclub, a drunken party.

FORBES: The Lonely Network

At the moment, a freeway operating at maximum efficiency is about 5% covered with cars, but driverless cars can be packed together in platoons, with just inches between the bumpers if the lead car has to slow down, it can simultaneously activate the brakes of all the cars behind it.

FORBES: Google's Trillion-Dollar Driverless Car -- Part 2: The Ripple Effects

One of the center squares contained a newly discovered pillar with the most intricate bas-reliefs to date: rows of sinuous-necked cranes and snakes packed efficiently together, like sardines in a can.

NEWYORKER: The Sanctuary