quite another thing

基本解释

That's quite another thing.
那完全是另外一回事。
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It's one thing to compile and install something, and quite another thing to make sure that the new software actually works.
编译和安装是一回事，而确信新软件工作正常完全是另一回事。
But indeed this is quite another thing.
不过，这次确实是另一码事。
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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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