1. He answered all the questions with assurance.
    他胸有成竹地回答了所有的问题。

2. The teacher lacked assurance in front of his class.
    那位教师在学生面前缺乏自信。

3. He gave me a definite assurance that the repairs would be finished tomorrow.
    他给我确切保证，修理将于明日完工。

4. He had the assurance to claim that he could speak ten foreign languages perfectly.
    他竟狂妄地宣称他能流利地讲十种外语。

5. The contractor gave assurances that the work would be completed on time.
    承包人表示过保证按时完工。

1. 保证；确保
    If you give someone an assurance that something is true or will happen, you say that it is definitely true or will definitely happen, in order to make them feel less worried.

assurance

    e.g. He would like an assurance that other forces will not move into the territory that his forces vacate...
           他想确保其他势力不会在他的军队撤离后进入这个地区。
    e.g. He will have been pleased by Marshal Yazov''s assurance of the armed forces'' loyalty.
           当亚佐夫元帅向他保证武装部队的忠诚时，他会感到心满意足的。

2. 信心；把握
    If you do something with assurance, you do it with a feeling of confidence and certainty.

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    e.g. Masur led the orchestra with assurance...
           马苏尔神定气若地指挥乐团。
    e.g. The EU is now acquiring greater assurance and authority.
           现在欧共体越来越有自信与权威性了。

3. （人寿）保险
    Assurance is insurance that provides cover in the event of death.

    e.g. ...endowment assurance.
           养老保险

1. freedom from doubt
    belief in yourself and your abilities

    e.g. his assurance in his superiority did not make him popular
           after that failure he lost his confidence
           she spoke with authority

    Synonym: self-assuranceconfidenceself-confidenceauthoritysureness

2. a statement intended to inspire confidence

    e.g. the President''s assurances were not respected

3. a binding commitment to do or give or refrain from something

    e.g. an assurance of help when needed
           signed a pledge never to reveal the secret

    Synonym: pledge

4. a British term for some kinds of insurance