航空公司内部升级的压力比较小，除非是为了安全问题或省钱而重新设计。

There's less pressure on the airlines to upgrade the interior, unless it's a safety issue or a redesign that will save money.

youdao

核升级的威胁依然存在。

The threat of nuclear escalation remains.

《柯林斯英汉双解大词典》

美国军方希望避免类似越南战争那种逐步升级的态势。

The U.S. military wants to avoid the graduated escalation that marked the Vietnam War.

《柯林斯英汉双解大词典》

And so if you choose to elect the hacker edition of this week's problem set the challenge will be to figure out not only how to implement the game but how to implement a solver for the game.

因此，如果你选择这周的应用题目为升级版,那么你将面临的挑战,不仅是如何实现这个游戏，而且,要实现此游戏的解决方法。

哈佛公开课 - 计算机科学课程节选

Now for the hacker edition, if you are feeling up to a bit more of a challenge you'll find that when you run the game, one it's not all that hard to use some ASCII art just make it a little fancier as the teaching fellow who implemented this solution did.

对于升级版，如果你能应付更大的,挑战，你会发现当你在玩这个游戏时，用一些字符画把它做得,比那些教学人员做的更有新意,并不是那么困难。

哈佛公开课 - 计算机科学课程节选