一旦这个百分比达到了，他们就以为大功告成，这样很不公平。

Once they reach the percentage, they feel they have done enough. I don't think that is fair.

youdao

然后急急忙忙地飞回去，照着王宫的样子用蜂蜡建造了一个皇宫模型，建造的速度如此之快，竟让人以为是从地底下冒出来的一般，天黑之前，已经是大功告成了。

Then they hurried back and modeled the palace in wax with such rapidity that any one looking on would have thought it was growing before his eyes.

youdao