So I say: " Hey. What's your ETA" ?

“嘿，“喂，你啥到（ETA） ？”

I could call you up over the phone and ask: What's your ETA?

你预什到达？

If someone’s pregnant, you can say “Hey, what’s the ETA on the baby? ”.

如果某人怀孕了， 您可以说“嘿， 婴儿的预到达间是多少？ ” 。

Our ETA is in two hours and maybe the airport will have the runways cleared of snow by then.

我们的预到达间还有，也许到那机场已经清除了跑道上的积雪。

The rules are fairly relaxed: the teams of two can take whichever route they fancy, there's only a rough ETA, and even the challenge element is optional.

由人组成的车队可以选择任何喜欢的路线，只有大致的预到达间，而挑战元素甚至是可选的。