… one thing, … another

结构︰

… is one thing, and … is another

说明︰

此句型意为“…是一回事，而…又是另一回事”。

To know is one thing; to teach is quite another.
知道是一回事，教又是另一回事。（学者未必是良师。）
It is one thing to make money, and it is another to spend it.
赚钱是一回事，而花钱又是另一回事。
Saying is one thing, and doing is another.
说是一回事，做又是另一回事。