" When the going gets tough, the tough get going." That's our motto!

“三十六计，走为上计。”你有没有听过，这是我们的格言。

When the going gets tough, this fighter just gets tougher.

它面对负面情况更为坚韧。

But even when the going gets tough, and it will, remember, tonight and always, what this is all about.

但即使今后会困难重重，也请永远记住，今晚，这一切是为了什么。

That way, when the going gets tough, beneficial mutations can be selected and harmful ones can be removed without ending the entire population.

这样，当环境变得不利于生存时，自然选择可以保留有益突变、剔除有害突变，而不至于让整个种群灭绝。