Dry, cracked earth in the US
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.
在长时间的干旱季节，含有泥土的地面可破裂（如图所示）。泥土在湿润时膨胀，干旱时收缩。
今日短语
英语短语 to crack on 意思是赶快继续吧。这个短语也被用来鼓励一个人赶快行动或开始行动。
例句
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.
请注意
Crack on 这个短语经常跟介词 with 连用。
I'm going to crack on with my report.
After lunch, they cracked on with painting the kitchen.
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