guarantee的词根为guaran
例句
1.
He gave me a guarantee that it would never happen again.
他向我保证这种事情绝不会再发生。
2.
We guarantee to deliver your goods within a week.
我们保证一周内交货。
3.
Basic human rights, including freedom of speech, are now guaranteed.
现在，包括言论自由在内的基本人权已有了保障。
