Browsing Basque translation

Translators: This phrase is spoken to inform the user of all of the MathML
enclosure notations associated with a given mathematical expression. For
instance, the expression x+y could be enclosed by a box, or enclosed by a
circle. It could also be enclosed by a box and a circle and long division
sign and have a line on the left and on the right and a vertical strike.
(Though let's hope not.) Given that we do not know the enclosures, their
order, or their combination, we'll present them as a list. This string
will be inserted before the final item in the list if there is more than
one enclosure notation. For more information about the MathML 'menclose'
element and its notation types, see:
http://www.w3.org/TR/MathML3/chapter3.html#presm.menclose