Yet many of those profits turned out to be ephemeral .

然而，那些利润中的一部分被证明是短暂的。

It 's just as important to record the ephemeral good times .

记录那些短暂的美好时光是重要的。

The analytical difficulty , however , lies in working out which of these trends will have staying power and which will turn out simply to reflect the ephemeral mood of the moment .

然而，分析的困难在于研判出在这些趋势中，哪种趋势具有持久力，哪种趋势最终只是现阶段一时氛围的反映。

Though most tools are ephemeral , some of your best tools are a simple pencil and sketch pad .

大多数工具的寿命都是短暂的，而你最好最长久的工具之一却是朴素的铅笔和素描本。

The gain may be ephemeral , however , as fallout from the housing bust and the recession persists .

不过，经济增速的提高可能是短暂的，因为楼市泡沫破裂和衰退的后果依然持续难消。