How then can these cells differentiate and form structures as different as roots, stems, leaves, and fruits?
那么这些细胞是如何分化并形成像根、茎、叶和果实那样不同的结构的呢？
Today we're thinking about the way that technology is influencing our social structures and the way we interact with one another.
今天，我们正在思考技术如何影响我们的社会结构以及我们与他人互动的方式。
Current life structures, career paths, educational choices, and social norms are out of tune with the emerging reality of longer lifespans.
当前的生活结构、职业道路、教育选择和社会规范与寿命正在变得更长这一现实脱节。
Imagine a world where there was no need for farming or growing crops and the same tastes and structures could be printed from an uncooked "food ink".
想象一下这样一个世界——不需要耕种或种植作物，同样的口味和结构可以用生的“食品墨水”打印出来。
These structures are called Passage Graves, because the inner chamber, sometimes several chambers in fact, could only be entered from the outside through a narrow passageway.
这些结构被称为通道式坟墓，因为这里的内室，有时实际上是几个房间，都只能从外面通过一个狭窄的通道进入。
"Still, gamification only stands to become more popular," he says, "as more and more people come into the workforce who are familiar with the structures and expressions of digital games."
不过，他表示，“随着越来越多熟悉数字游戏结构和表达方式的人进入职场，游戏化只会变得更受欢迎。”
The explosion of weak ties could have profound consequences for our social structures too, according to Judith Donath of the Berkman Center for Internet and Society at Harvard University.
哈佛大学伯克曼互联网与社会中心的Judith Donath 认为，弱联系的激增也会对我们的社会结构产生深远的影响。
In the fourteenth and fifteenth centuries, many Western Pueblo settlements in what is now the southwestern United States may have possessed distinctly hierarchical organizational structures.
在14世纪和15世纪，许多位于现在美国西南部的西部普韦布洛定居点可能拥有明显的等级组织结构。
When we think of large monumental structures built by early societies, an Egyptian pyramid probably comes to mind.
当我们想到早期社会建造的大型纪念性建筑时，很可能会想起埃及金字塔。
Architecture is the art and science of designing structures that organize and enclose space for practical and symbolic purposes.
建筑是一门设计建筑物的艺术和科学，为实用性和象征性的目的而组织和包围空间。
The ants also eat yellow structures at the tip of leaflets: these are protein-rich and seem to have no function for the tree except to attract ants.
蚂蚁还吃小叶顶端的黄色组织：这些结构富含蛋白质，除了吸引蚂蚁外，似乎对树没有任何其他作用。
Even as the setting sun silhouettes these gigantic structures against the great desert expanse, a call for prayer floats over semi-finished apartment blocks filled with the activity of city life.
在广阔的沙漠中，夕阳映照出这些巨大建筑的轮廓，但在充满城市生活活力的半成品公寓楼上空，传来了祈祷的召唤。
The arch was used by the early cultures of the Mediterranean area chiefly for underground drains, but it was the Romans who first developed and used the arch extensively in aboveground structures.
在地中海区域的早期文明中，拱形结构主要被运用在地下排水管上，但在地上建筑中首先发展并广泛使用拱门的是罗马人。
The ancestors of the modern Zuni and Hopi built and then, for reasons still mysterious, abandoned the complex roads and structures of the domain they ruled a millennium ago in the American southwest.
一千年前在美国西南部，现代祖尼人和霍皮人的祖先在他们统治的土地上修建了复杂的道路和建筑，后来由于一些不为人所知的原因，又遗弃了这些复杂的道路和建筑。
玩味句子结构。
The appeal of small structures is undeniable.
小型建筑的吸引力是无可否认的。
These structures provide homes for fish and crabs.
这些结构为鱼类和蟹类提供了家园。
Narrow structures extend into the blue water like docks;
狭长的建筑物像码头一样向蓝色的水域延伸。
"Most adaptations are built from previous structures," he says.
他说：“多数适应都是以此前的结构为基础。”
Butterfly wings are made from microscopic structures that reflect light.
蝴蝶翅膀有着精密的结构从而可以反射光线。
Vary sentence structures by blending simple, compound, and complex sentences.
也可以用简单、复合或者复杂句来增加句子结构的种类。
Neither fancy nor elegant, these log structures would be their first real homes.
既不奇特也不优雅，这些原木结构的建筑物将是他们第一个真正的家。
The heart of all programming is the creation and manipulation of data structures.
所有编程的核心都是创建和操作数据结构。
XML can represent data as simple structures or as complex and elaborate structures.
XML可以将数据表示为简单的结构，或者表示为复杂而详细的结构。
The light bounces off the structures so that the scales appear to us as a shimmering green.
光从这种结构上反射回来，在我们看来，鳞片就是发着微光的绿色。
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