如果你在相当长的一段时间内获得的回报比投入少,那么,赶紧撤退。
If you are getting less back than you put in over a considerable period of time, back off.
在相当长的一段时间内,人们投入了大量的精力研究树木的造型和绘制算法。
Over a long time, more work have been focused on modeling the shape and the growth of the trees.
人谁有胃酸倒流频繁,在相当长的一段时间内,也有轻微增加患癌风险的食道。
People who have acid reflux frequently, over a long period of time, also have a slightly increased risk of developing cancer of the oesophagus.
It is also pretty clear that for some after the foundation of the polis, there were no city walls.
而且很明显,在城邦建立起来之后的相当长的一段时间内,都没有城墙
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