In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

The AFC Champions League ( abbreviated as ACL ) , commonly known as the Asian Champions League , is an annual continental club football competition organised by the Asian Football Confederation ( AFC ) .
The AFC Champions League is a football competition between the best club teams in Asia .

Many predatory mammals have protractile claws that can partially hide inside the animal 's paw , especially the cat family , Felidae , almost all of whose members have fully protractible claws .
Many predatory mammals have claws that can hide inside the animal 's paw , especially animals such as the cat .

The boundaries between perennial , intermittent , and ephemeral channels are not defined , and subject to a variety of identification methods adopted by local governments , academics , and others with a need to classify stream-flow permanence .
The differences between perennial , intermittent , and ephemeral streams are not exact and can change if different measures are used by different groups .