That's quite another thing.

那完全是另外一回事。

youdao

However, it's one thing to say and quite another thing to do.

然而，说是一回事，做却是另一回事。

youdao

It is one thing to make a mistake, and quite another thing not to admit it.

犯错误是一回事，不承认就是另外一回事了。

youdao

It is quite another thing to state that there is no difference between Romney and Obama.

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Then you spend a little more time with it, you start actually trying to do things on it, and it becomes quite another thing entirely.

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While one might make a good sounding case for a different tax system, it is quite another thing to come up with a scheme that will actually gain political momentum and can be affected.

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