ponder (v.)
思考，沉思

例句：
Laura pondered upon the meaning of life.
劳拉思考着生活的意义。

in one's glory
得意，踌躇满志

例句：
When John won the race, he was in his glory.
当约翰赢得比赛时，他非常得意。

It's up in the air.
尚未决定 

对话：
A: Jack¹, have you got that job yet?
B: Not yet. It's up in the air. I haven't made up my mind yet.
　　　　　　　　
A：杰克，你得到那份工作了吗？
B：还没有。尚未决定，我还没有下定决心。