停滞不前就等于落后。

Stand still and you're lost.

youdao

时间从不停滞不前。

Time never stands still.

youdao

我认为经济在缓慢增长的水平上停滞不前。

I think the economy is stuck on a plateau of slow growth.

《柯林斯英汉双解大词典》

It also is driven very much by a secessionist account of Judaism as being something that was moribund at the time of Jesus.

它同样也被一系列的犹太主义推动,作为在耶酥时期停滞不前的东西。

耶鲁公开课 - 旧约导论课程节选

Modernity is, in his work, a condition of social and psychological fragmentation which is both a private, personal dilemma and a public one, as he understands it.

在他的作品里，现代性，是一种社会和心理上的零散状态,就他而言，这既是个人的僵局，也是社会的停滞不前。

耶鲁公开课 - 现代诗歌课程节选

And for Milton, whose temperament up to this point inclined him obviously to hesitation, to postponement, and to merely the anticipation of profit, the pressure applied by this parable of the unprofitable servant may very well have seemed utterly unbearable.

对于弥尔顿来说，这是性格使然,他读到这里会犹豫，会止步不前，会对利益有所期待，这则寓言中毫无收益的仆人,给了他无尽的压力。

耶鲁公开课 - 弥尔顿课程节选