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；