彼(かの)女(じょ) kanojoを o一人(ひとり)に()し()て() hitorinishiteおいた oitaほうがいい hougaii。 You should leave her alone. Literal Her alone [into-に] leave [better-ほうがいい]. 一人にしておいたほうがいい advises non-intervention. ~ておく marks the deliberate decision to leave things as they are. advice and suggestions~た方がいい (had better)~ておく (do in advance)
彼(かの)女(じょ) kanojoを o一人(ひとり)に()し()て() hitorinishiteおいた oitaほうがいい hougaii。 You should leave her alone. Literal Her alone [into-に] leave [better-ほうがいい]. 一人にしておいたほうがいい advises non-intervention. ~ておく marks the deliberate decision to leave things as they are. advice and suggestions~た方がいい (had better)~ておく (do in advance)