As the plant grows, stem cell clusters called meristems generate new xylem cells, which form bigger pipes to suit the plant's needs.

随着植物的生长，被称为分生组织的干细胞簇产生新的木质部细胞，这些细胞形成更大的管道以适应植物的需要。

The biologists figured this out by engineering mice so they could activate either or both of these cell clusters.

生物学家通过工程小鼠解决了这个问题，因此他们可以激活这些细胞群中的一个或两个。

These behaviors are determined by our circadian system — which is anchored by a pair of nerve cell clusters located in the anterior hypothalamus.

他们的行为由生物钟调控——由位于下丘脑前部的一组神经元维护。

Its sensory neurons create a nerve cell cluster called trigeminal ganglion, located in the bones on the side of the face between the eyes and ears.

它的感觉神经元组成了一组神经细胞簇，叫做三叉神经节，位于两侧眼与耳中间的骨骼中。

Also, like a cluster of cells, clusters of particle robots don't need to be organised in a particular structure or shape to work.

此外，就像细胞群一样，粒子机器人群不需要以特定的结构或形状组织起来就能工作。

And to verify that these clusters were involved with different aspects of hunting, they also damaged one of those cell clusters in some mice, and damaged the other cluster in other mice.

为了验证这些细胞群是否与狩猎的不同方面有关，他们还破坏了一些小鼠的其中一个细胞群， 并破坏了其他小鼠的另一个细胞群。