他们那时已不再用骡子和马来犁地了。
They were no longer using mules and horses to plough their fields.
你可以重新开始学习数学，直到该学犁地的时候。
You can start again on mathematics, until is it is time to learn to plough.
农民会在年初时犁地，给作物提供尽可能好的环境。
At the beginning of the year, farmers plow the soil, giving crops the best possible environment.
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