I then considered leaving my stateroom. Was I free or still a prisoner? Perfectly free. I opened my door, headed down the gangways, and climbed the central companionway.

我心里盘算着走出这个房间。心想我已经恢复了自由？或者仍旧是囚人？其实，我又完全自由了。我打开门，走人过道，上了中央铁梯。

And if you poke your head in the classroom next door, which is rather loud, you will see the kids are in their small groups, using their math skills to calculate the human capacity for their spacecraft.

如果你在隔壁的教室里探出头来，那是相当吵闹的，你会看到孩子们在他们的小组中，利用他们的数学技能来计算他们的航天器的载人能力。