OET interlinear ACTs 27:34

uW Translation Notes:

Note 1 topic: figures-of-speech / abstractnouns

τοῦτο & πρὸς τῆς ὑμετέρας σωτηρίας ὑπάρχει

this & (Some words not found in SR-GNT: Διό παρακαλῶ ὑμᾶς μεταλαβεῖν τροφῆς τοῦτο γάρ πρός τῆς ὑμετέρας σωτηρίας ὑπάρχει οὐδενός γάρ ὑμῶν θρίξ ἀπό τῆς κεφαλῆς ἀπολεῖται)

If your language does not use an abstract noun for the idea of salvation, you could express the same idea in another way. Alternate translation: [this will save you] or [this will keep you alive]

Note 2 topic: figures-of-speech / synecdoche

οὐδενὸς & ὑμῶν θρὶξ ἀπὸ τῆς κεφαλῆς ἀπολεῖται

(Some words not found in SR-GNT: Διό παρακαλῶ ὑμᾶς μεταλαβεῖν τροφῆς τοῦτο γάρ πρός τῆς ὑμετέρας σωτηρίας ὑπάρχει οὐδενός γάρ ὑμῶν θρίξ ἀπό τῆς κεφαλῆς ἀπολεῖται)

Paul is using one part of each of his listeners, a hair from his head, to represent all of that listener. If it would be helpful in your language, you could use an equivalent expression from your culture or state the meaning plainly. Alternate translation: [each of you will survive without suffering harm]