In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

[Q]: El Salvador ( ; -RSB- ) , officially the Republic of El Salvador ( , literally " Republic of The Savior " ) , is the smallest and the most densely populated country in Central America .
[A]: El Salvador is the smallest and most densely populated country in Central America .


[Q]: " China syndrome " is a fanciful term — not intended to be taken literally — that describes a fictional result of a nuclear meltdown , where reactor components melt through their containment structures and into the underlying earth , " all the way to China . "
[A]: The term " China syndrome " refers to a scenario , not meant to be taken literally , where a reactor core could melt through the Earth " all the way to China " .


[Q]: In mathematical optimization and decision theory , a loss function or cost function is a function that maps an event or values of one or more variables onto a real number intuitively representing some " cost " associated with the event .
[A]:
In mathematics a loss function or cost function is a mathematical function that maps an event , or the values of one or more variables onto a real number .