You can only go next if you have already gone back through your previous commands.

如果已经遍历完前面的所有命令，则只能移动到下一个命令。

youdao

Back in 1836, the young Charles Darwin was coming to the end of his five-year mission to explore strange new worlds and boldly go where no naturalist had gone before.

回到1836年，当时年轻的查尔斯·达尔文即将完成他五年的使命-探索陌生世界，勇敢深入到自然学家前所未去的地方。

youdao

By now I had gone too far: I must have passed her; I turned around to go back the way I'd come.

这时我已经走得很远：我想我一定是赶在她的前头了；我调转车头，沿着来路回去。

youdao

We have seen cases where we have been gone five and ten years and we go back and they have developed roads and built schools, and they have other communities receiving the animals and the training.

VOA: special.2010.06.22

It's gone down a path towards maturation that's very difficult to go back up.

它在分化成熟的道路上越走越远,覆水难收了

耶鲁公开课 - 生物医学工程探索课程节选

We'll loop back as we go through the class to questions about what's gone so horribly wrong, and more important, from a public health point of view, what can be done about it?

当所有的课都上完后我们会再回头看,到底是什么出了问题,更重要的是,从公共健康的角度来看,如何才能纠正这些错误呢

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The problem for many runners is that once they have gone barefoot, they can't go back.

WSJ: Barefoot Jocks Keep Gym Members on Their Toes

In fact, as the competition has gone bigger, I've found it harder and harder to go back to the tiny 3.5-inch panel of the 4S and its predecessors.

ENGADGET: Editorial: Engadget on Apple's iPhone 5 event

Reece looked to have gone over for a score-levelling try with five minutes to go but was pulled back for a forward pass.

BBC: Gareth Thomas scores on Wales debut in loss to Italy