The sign “understand” have two different meanings.
1. “understand” as a verb = comprehend
2. “understand” as a conjunction = to clarify
As a conjunction, it can be translated as “but” or "only".
The sign “important” have two different meanings.
1. “important” as an adjective = essential
2. “important” as a conjunction = to specify
As a conjunction, it can be translated as “as long as”.
Verb: We understand how to film with the phone.
Conjunction: We will film but with the phone.
Verb: I understand about eating after exercise.
Conjunction: I will eat but after exercise.
Adjective: I saved the important messages, not the videos.
Conjunction: I saved the messages as long as they are not videos.
Adjective: I will work with important people.
Conjunction: I will work as long as it's with people.