Well begun is half done, as the saying goes.

常言道，良好的开始等于事成一半。

How could you be half done?

你怎么可能弄了一半了？

How could you be half done? You didn't have any kosher ingredients.

怎么可能? 你没任何犹太教要求的调料。

Wait 30 minutes, and one batch is now done, one batch is half done, and another is ready to go in.

等30分钟，一批做好了，一批做了一半，另一批可以进去了。

Before her journey was half done, winter overtook her, and greatly increased her hardships; but some carriers with whom she fell in were very kind to her.

她的旅途还没到一半，冬天就来了，这大大增加了她旅途的难度；但是她搭上了一些运输工人的车，他们都对她很好。