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1·Flattery is like cologne water, to is smell of, not swallow.

恭维话好比古龙说科隆香水，是为了闻，而非为吞的东西。

2·Flattery be like cologne water, to be smell of, not swallow.

恭维话好比古龙说[科隆香水]，是为了闻，而非为吞的东西。

3·Reinhard Strey of the University of Cologne is, however, having another go. He thinks he has cracked the main (and obvious) difficulty—that oil and water do not easily mix.

事实上这个方法很多年前便已为人知晓，但是之前试图将其转化为实践技术的尝试都失败了，然而克隆大学的莱茵哈德斯特雷现在又卷土重来，他认为自己已经攻克其中主要的（也是最明显的）的难关—油和水不易混合的问题。