How can I incorporate a variable into a string? How can I incorporate a variable into a string, so that the result is a longer string that includes the contents of a given variable?

For example, I have a variable called apple and its value is "Arlington Pippin" (it's a type of apple). I'd like to end up with a phrase that reads:


  There is an Arlington Pippin.


How could I accomplish this?
If you‘ve got a multi-lingual site (or even if you don’t), you can pass variables into strings with the |t filter:

{{ "Welcome back, {name}"|t( {'name': currentUser.name} ) }}


(See http://buildwithcraft.com/help/static-translations for details on how you can use the |t filter to translate your text.)