late 14c., "formal or solemn pledge, promise," also "certainty," from Old French asseurance (11c., Modern French assurance) "assurance, promise; truce; certainty, safety, security," from asseurer (see assure). The word had a negative tinge 18c., often suggesting impudence or presumption.
实用例句
1. 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。
来自柯林斯例句
2. They had given an absolute assurance that it would be kept secret.
他们信誓旦旦地保证将对此绝对保密。
来自柯林斯例句
3. Masur led the orchestra with assurance.
马苏尔神定气若地指挥乐团。
来自柯林斯例句
4. The young teacher lacked assurance in front of his class.
这位青年教师在学生面前缺少自信心.
来自《简明英汉词典》
5. Progress is the activity of today and the assurance of tomorrow.