None of these solutions is exactly costless.

这些解决办法并非完全不需要花钱。

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The strategies make use of simple messages that can generate significant returns with changes that are virtually costless.

这类策略利用的都是简单的信息，能够产生相当可观的收益，而达成这种改变的成本几乎可以忽略不计。

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There was a time, back in the 1950s and 1960s, when Keynesian stimulus packages were seen as costless.

ECONOMIST: A new economic era is dawning

There is a common fallacy, not least in Germany, that dropping the Greeks would be a fairly costless way to teach a useful lesson.

ECONOMIST: The euro

As moaning is costless, a chorus of wailing customers is predictable.

ECONOMIST: The microeconomics of complaining: Making moaners pay | The