duck out可不是“鸭子跑了”，更不是“煮熟的鸭子飞了”实际意思是“逃避;推脱;回避”

【例句】
It's his turn to cook dinner, but I bet he'll try to duck out of it.
轮到他做晚饭了，但我敢打赌他会想方设法逃避的。

You can't duck out once you've taken on a responsibility.
一旦承担起责任你就不能逃避。