(rail transport) local train, a train that stops at every station (abbr. 普通)

(vulgar) second-person pronoun: you / (derogatory) first- or third-person reflexive pronoun: me, myself, himself, herself, itself, oneself

a tropical rainforest

yes, yeah; it's like that; that's how it is; I see. (interjection to show that the speaker is paying attention)