overture
英 ['əʊvətj(ʊ)ə]
美['ovətʃʊr]
	    - n. 前奏曲;提案;序幕
 - vt. 提议;为……奏前奏曲
 
英英释意
- 1. orchestral music played at the beginning of an opera or oratorio
 
- 2. something that serves as a preceding event or introduces what follows;
 - "training is a necessary preliminary to employment"
 - "drinks were the overture to dinner"
 
- 3. a tentative suggestion designed to elicit the reactions of others;
 - "she rejected his advances"