1. Believed is a passive voice, which means it is "recognized" by most people. It is generally believed=Peple generally believe.
2. The "are" in "are born" is the present tense, which usually means "I was born..." when it means the time of birth, but "some people are born with certain talents" means a person. Scientific theorem, when expressing scientific theorem, the present simple tense is generally used. 3. Strictly speaking, the "born" in are born is the past participle of bear, which can also be understood as an adjective. An excited boy, a locked door, a broken window, etc. can be directly followed by nouns. This is a typical past participle. As an adjective, born cannot be followed by a noun, so in general, it is a past participle here.
The rough translation is: 1. It is recognized that some people are born with certain special talents.
2. People generally believe that some people are gifted.