Okay-technically, a submarine does have rockets.
好吧，严格地来说，潜艇上是有火箭的。
Unfortunately, the rockets are pointing the wrong way to give the submarine a push. Rockets are self-propelling, which means they have very little recoil. When a gun fires a bullet, it 8217;s pushing the bullet up to speed. With a rocket, you just light it and let go. Launching missiles won 8217;t propel a submarine forward.
不幸的是，潜艇上的“火箭”的朝向不对，没法把潜艇推离轨道。火箭靠自身携带的燃料推进，意味着发射火箭的后坐力极小。当枪射出子弹时，枪其实在把子弹向前推。但如果是火箭的话，你只是启动了火箭，然后它就自己飞走了。发射艇载导弹并不能向前推动潜艇。
But not launching them could.
但如果你不发射的话却可以。
If the ballistic missiles carried by a modern nuclear submarine were taken from their tubes, turned around, and placed in the tubes backward, they could each change the submarine 8217;s speed by about 4 meters per second.
如果把现代核潜艇中搭载的弹道导弹从发射管中取出来，调个头再塞回发射管中并点火，那么每枚导弹都能使潜艇的速度提升改变约每秒4米。
A typical de-orbiting maneuver requires in the neighborhood of 100 m/s of delta-v (speed change), which means that the 24 Trident missiles carried by an Ohio-class submarine could be just enough to get it out of orbit.
典型的脱离轨道机动需要使速度降至大约每秒100米，这意味着“俄亥俄级”核潜艇上搭载的24枚“三叉戟”导弹就足够使自己脱离地球轨道了。
Now, because the submarine has no heat-dissipating ablative tiles, and because it 8217;s not aerodynamically stable at hypersonic velocities, it would inevitably tumble and break up in the air.
脱离轨道后，由于潜艇并不配备散热用的隔热瓦，在超音速下也不具有空气动力稳定性，因而它将不可避免地开始翻转并在空中解体。
If you tucked yourself into the right crevice in the submarine-and were strapped into an acceleration couch-there 8217;s a tiny, tiny, tiny chance that you could survive the rapid deceleration. Then you 8217;d need to jump out of the wreckage with a parachute before it hit the ground.
如果你能挤进一个正确的缝隙中，并且把自己绑在加速度座椅上，那么你有很小很小很小的几率能够撑过剧烈的减速阶段。之后你需要在潜艇撞击到地面之前带上一个降落伞跳出残骸。
If you ever try this, and I suggest you don 8217;t, I have one piece of advice that is absolutely critical:
如果你真的打算这么做（我并不推荐），有一个绝对重要的事情你需要牢记在心：
Remember to disable the detonators on the missiles.
记得解除导弹上的引爆装置。
1 This is why, even though matches and torches are about the same temperature, you see tough guys in movies extinguish matches by pinching them but never see them do the same with torches.
1． 这也是为什么即使火柴和火炬的火焰温度差不多，在电影中你只会看到那些大块头们用手一捏就能灭了火柴，但绝不会看到他们对火炬做同样的事情。
2 Or conduction.
2． 通过热传导流失的热量也变少了。
3 This is my single favorite word in the English language. It means the warmth of sunlight in winter.
3． apricity，这是我最喜欢的一个英文单词，它的意思是冬日里的阳光。
4 When they moved into the Sun, the sub 8217;s surface would warm, but they 8217;d still be losing heat faster than they 8217;d be gaining it.
4． 当他们朝太阳方向运行时，潜艇的表面会升温，但整体热量流失的速度仍然大于热量获取的速度。