presolving

pre-

Before; physically in front of. · Before; earlier in time; beforehand.

也可拆解为

-ing

Used to form nouns or noun-like words (or elements of noun phrases) from verbs, denoting the act of doing something, an action, or the embodiment of an action. · Used to form nouns denoting materials or systems of objects which are used or employed in an action, or considered collectively.