永恒之塔 Aion是受铁路启发的实用工具箱，可让您以友好的方式编写Duration和DateTime ： // Easily represent a chrono::Duration let two_days = 2 . days (); let attention_span = 1 . seconds (); // Add or subtract durations from the current time (UTC) let now = Utc :: now (); let three