群体生态系统的广泛活动很大程度上是自发的，由参与者的共同热情所驱动，但没有任何明确定义的“中心”来组织这些努力。
Pack ecosystems represent broad initiatives that are largely spontaneous, driven by a common passion among a group of participants without any clearly defined "center" to organize the efforts.
在像世界卫生组织这样一个有着8000多名职员在世界上众多不同地区从事着广泛活动的庞大组织中，从来没有人能够概观我们工作的全貌。
In an organization as big as WHO, with over 8,000 staff working on a wide range of activities in many different parts of the world, no one can ever see the entirety of our work.
这位演员参加任何一项活动，都引起媒体的广泛关注。
Any event attended by the actor received widespread media coverage.
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