He toiled in rice fields, dug canals, collected dung for fertilizer, and herded cattle.
他曾在稻田上挥汗，挖运河，牧牛羊，搜集粪便做堆肥。
The surveys showed that the weed distribution in rice fields in Shanghai was obviously various due to the differences of soil type, acid-base scale and terrain between areas.
调查结果表明，由于地区间土壤种类、酸碱度、地势差异，上海稻田杂草的分布和危害有明显区域性。
The species pools of predatory arthropod communities in rice fields were influenced by the history of pest control, the coverage of vegetation, the diversity of environment, and climatic factors.
本文对稻田捕食性节肢动物群落的种库和群落的重建进行了初步的研究。害虫防治史、植被覆盖度、环境复杂性和气候因子等对种库都有不同程度的影响。
The species pools of predatory arthropod communities in rice fields were influenced by the history of pest control, the coverage of vegetation, the diversity of environment, and climatic factors.
本文对稻田捕食性节肢动物群落的种库和群落的重建进行了初步的研究。害虫防治史、植被覆盖度、环境复杂性和气候因子等对种库都有不同程度的影响。
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