He speaks English. She speaks Mandarin. Our tech reporter spent time with David Duda and Hong Liang, who rely on A.I. translation and external battery packs. If their phones die, so does the married couple’s ability to communicate. Video by Kashmir Hill, Gilad Thaler, Kassie Bracken, Jon Miller, Jon Hazell, Joey Sendaydiego/The New York Times #translation #AI #artificialintelligence #language #mandarin