《天工开物·上篇·乃粒》
有的农民家里缺少畜力，两个人就在犁上绑一根杠子，两人一前一后拉犁翻耕，狠劲干一整天，才能抵得上一头牛的劳动效率。
凡牛力穷者，两人以扛悬耜，项背相望而起土。两人竟日仅敌一牛之力。
Some farmers do not have enough animals to help with the farming, so two people would tie a pole to the plough, and pull the plough from the front and the back, working hard all day to achieve the work efficiency of a cow.
<s>[INST] 将以下英文转换为文言文: Some farmers do not have enough animals to help with the farming, so two people would tie a pole to the plough, and pull the plough from the front and the back, working hard all day to achieve the work efficiency of a cow. [/INST] 凡牛力穷者，两人以扛悬耜，项背相望而起土。两人竟日仅敌一牛之力。</s>
将以下英文转换为文言文: Some farmers do not have enough animals to help with the farming, so two people would tie a pole to the plough, and pull the plough from the front and the back, working hard all day to achieve the work efficiency of a cow.
user
凡牛力穷者，两人以扛悬耜，项背相望而起土。两人竟日仅敌一牛之力。
assistant