This meant there could be delays of up to 44 minutes roundtrip for communication data.

这意味着通信数据往返可能会延迟长达44分钟。

If there were 99 candles, this method would take 24 roundtrips and involve visiting nearly 2,700 candles.

如果一共有 99 支蜡烛，这种方法需要往返 24 次，需要经过近 2700 支蜡烛。

Each year, almost the entire world population of these critically endangered birds make a 9,000-kilometer roundtrip to spend the winter at Poyang.

每年几乎全世界这些濒临灭绝的鸟儿们都要为了在鄱阳湖度过寒冬而跋涉9000公里的往返旅行。

With current technology, how long would it take for humans to make a roundtrip to Mars?

以目前的技术，人类往返火星需要多长时间？

So going to Mars, and you take two and a half, three years roundtrip, and astronauts can only eat so many freeze-dried, rehydrated food before they go crazy.

所以去火星，你要花两年半到三年的时间往返，宇航员在崩溃之前只能吃那些冻干、再水化的食物。

It's an international competition put on by NASA and the Canadian Space Agency to find ways to create healthy tasty foods for astronauts on long missions, like roundtrip to Mars.

这是一项由美国国家航空航天局和加拿大航天局举办的国际竞赛，目的是为执行长途任务的宇航员，比如往返火星的宇航员，寻找制造健康美味食物的方法。