Self-study 1a

initial: adj. [only before noun] happening at the beginning; first;

ambiguity: n. 1、[U] the state of having more than one possible meaning;2、[C] a word or statement that can be understood in more than one way;3、[C, U] the state of being difficult to understand or explain because of involving many different aspects;

clarify: v. to make sth clearer or easier to understand;to make sth, especially butter, pure by heating it;