think back in the past

Tropical forests that we think of as intact [could have] suffered major disturbances in the not-too-distant past and are still in the process of growing back.

在不太遥远的过去，我们所认为的完好无损的热带森林经受过重大干扰，并仍然继续成长过程。

Looking back, and continuing to think this problem through, I feel that if anything, I should have concentrated slightly more than I have in the past.

回顾过去，我对这个问题经过持续深入思考后认为，如果要改变什么的话，我会比过去的方式稍稍更加集中持股。

Wandering in the past and now, I think now, suddenly back, found that a string of deep shallow footprint, in deducing the sections of the story of a dream.

我徘徊在过去与现在，思考现在，蓦然回道，发现那一串串深深浅浅的脚印，在演绎着一段段梦一般的故事。