That is mere talk.

那只不过是空论。

《新英汉大辞典》

All these will be mere talk if I am idle now.

所有这些将仅仅谈论如果我现在闲置。

youdao

Hard work: All hard work bring a profit, but mere talk leads only to poverty.

坚苦工作：所有坚苦工作皆带来赢利，但只说不做只会使人变穷。

youdao

Two of the four possible actions he mentioned seemed to suggest consumers and markets could be fooled into confidence with mere talk.

FORBES: We May Already Be In Recession

Mere talk of opening up America's coastal waters, the theory runs, has convinced traders of a big future boost to oil supplies and so pushed the price down.

ECONOMIST: Finding more oil has become the first issue of the campaign

Already Nintendo and Sony stock has risen in Japan with mere talk about the ban being eliminated, and it would surely be a huge boon to both if the law was in fact reversed.

FORBES: Nintendo, Sony Thrilled as China Considers Lifting 12 Year Ban on Console Sales