I'm cautiously optimistic.

　　我持謹慎的樂觀態度。

　　She is an obedient woman.

　　她是位溫順的女人。

　　A key resource to be used at an opportune moment.

　　王牌適當時刻所用的關鍵手段。

　　The offer could not have come at a more opportune moment.

　　那個建議提得正是時候。

　　Yes, and it can be as ornate as you want.

　　可以，盡你所想的豪華。