The new cities and towns, squeezed by their walls, had to know and order time in order to organize collective activity and ration space.

在新的城市和小镇，由于其空间的限制，那里的居民必须要知道确切的时间且安排好时间，以组织集体活动和分配空间。

youdao

Arts activity demands a collective effort.

艺术活动需要集体努力。

youdao

This sort of activity damages the reputation of the collective.

这种行为有损于集体的荣誉。

《新英汉大辞典》

Moreover, unlike art, science is a collective activity that demands collaboration.

ECONOMIST: History of science

In the decision Thursday, Second Circuit Judge Jose Cabranes held that the union representing the City College of New York could not force David Seidemann to pay dues for "ideological" activity not related to the union's core job of collective bargaining.

FORBES: Magazine Article

Social activity has long been embedded in most online services, from Google search (based on the collective linking choices of website owners) and email to Pinterest, Twitter, and those content sharing services such as ShareThis and AddThis.

FORBES: Social Marketing Isn't Just About Facebook