Definition
To begin doing something with speed and efficiency.
迅速开始做某事。
We need to get cracking on preparing the presentation; time is running out.
我们需要赶紧开始准备简报；时间不多了。
If you want to finish this project on time, you had better get cracking.
如果你想按时完成这个项目，你最好赶紧开始。
We need to get cracking on these chores before we can go to the park.
我们需要赶紧完成这些家务，然后才能去公园。