the reality is ——

used to assert that the truth of a matter is not what one would think or expect

事實是——

the popular view of the Dobermann is of an aggressive guard dog—the reality is very different.

人們一般認為這種德國種短毛獵犬是一種攻擊性的看門狗——事實卻大不一樣。

in reality

In fact; actually.

事實上；實際上