signal

/ˈsɪgnəl/

notably out of the ordinary

Chinese meaning: 显著的；重大的

The discovery of water on Mars was a signal achievement in space exploration.

在火星上发现水是太空探索中的一项重大成就。

Her signal contribution to the project earned her a promotion.

她对项目的显著贡献为她赢得了晋升。