不错嘛！一挥而就。

Not bad! You did it in one go.

成功的论文无法一挥而就。

It is impossible to have your paper successfully written the very first time.

以前关于郭尔王的那一套，他是一挥而就的。

All that King Goll crap that he had on, he's tossing it off.

图案一挥而就，鱼儿在水中畅游，大雁在空中飞翔，龙凤在时空中高举着自由的大旗。

Design one go, the fish swimming in the water, geese fly in the air, dragon and phoenix in space and time to hold high the banner of freedom.