把这一句，留给此刻的你

After the loss of Columbia a couple of years ago, I think we were reminded of the risk. All of us, though, have always known that the Space Shuttle is a very risky vehicle, much more risky than even flying airplanes in combat.

在几年前失去哥伦比亚大学之后，我想我们意识到了其中的风险。然而，我们都知道航天飞机是一种非常危险的飞行器，甚至比在战斗中驾驶飞机还要危险得多。

— Mark Kelly 凯利