During long periods of dry weather, earth which contains lots of clay can crack, as in the picture above. Clay gets bigger when wet and smaller when dry.
英語短語 to crack on 意思是趕快繼續吧。這個短語也被用來鼓勵一個人趕快行動或開始行動。
We need to crack on and get today's work finished.
A: Can I start moving the boxes into the living room?
B: Yes, crack on.
Crack on 這個短語經常跟介詞 with 連用。
I'm going to crack on with my report.
After lunch, they cracked on with painting the kitchen.