upmost

例句：

1. 1.The mountain was upmost in the sky.
   那座山在天空中显得最高。
2. 2.The importance of this issue cannot be upmost.
   这个问题的重要性不能被忽视。
3. 3. The team worked upmost to ensure the success of the event.
   团队全力以赴确保活动的顺利进行。