sign,标记，记号，-fic,做，使，词源同 fact,efficient.引申比喻词义重要的，有意义的等。

1. Today's Security Council resolution will be a significant success for American diplomacy.

今天的安理会决议对于美国外交而言是一次重大的成功。

2. The learner's attention needs to be directed to the significant features.

需要将学习者的注意力引向那些着重点上。

3. The company looks poised to make a significant breakthrough in China.

这家公司看来很有把握在中国取得重大突破。

4. It was clear that there was significant support for the Islamists.

显然伊斯兰教徒获得了相当多的支持。

5. Two significant constants have been found in a number of research studies.

若干研究已经发现了两个重要常量。