'static lifetime

"Since a static variable's memory is allocated when the program starts, a reference to a variable in static memory is, by definition, 'static, as it is not deallocated until the program shuts down. The inverse is not true - there can be 'static references that do not point to static memory - but the name is still appropriate: once you create a reference with a static lifetime, whatever it points to might as well be in static memory as far as the rest of the program is concerned, as it can be used for however long your program wishes."

This is from Rust for Rustaceans. I'm having trouble understanding the part from "The inverse is not true" onward. Could anyone clarify with examples? Thanks!