单一做法，可以将复种轮作系统的使用，边界，覆盖作物。
Monoculture practices can incorporate multiple cropping systems by using rotations, borders, and cover crops.
结果表明，土壤轻组有机碳和氮含量苜蓿-作物轮作系统高于苜蓿草地。
The results showed that light fraction C and N pools of the alfalfa-crop rotation systems were higher than in alfalfa grassland.
中稻套播黑麦草系统在湖南气候条件下是一种较为合理的粮饲轮作系统。
The mid-season rice with ryegrass is a best pattern in Hunan province.
结果表明，优化施肥能明显降低稻-麦轮作系统中的氨挥发损失，提高稻麦对氮素的利用率。
The results showed that ammonia volatilization losing could be obviously reduced in rice-wheat rotation system with optimization method, and nitrogen efficiency was also improved.
公元1000年和1300年间，欧洲城市人口翻了一倍多，达到7千万人(与改良工具后人们运行了新式的轮作系统有关)。
Between 1000 and 1300 Europe's urban population more than doubled, to about 70m (thanks partly to a new system of crop rotation, made possible by better tools).
轮作系统不但提高了作物产量，而且总初级生产力、光能利用率、辅助能利用率分别比连作系统高17.47%、9.87%和5.0%。
Moreover, the overall initiative productivity, light energy using rate and assistant energy using rate was increased by 17.47%, 9.87%, 5.0% respectively.
水旱轮作是我国重要的作物种植系统，在确保作物稳产、高产和提高种植业经济效益方面具有重要的地位。
Paddy-upland rotation is a main crop cultivation systems and has an important position in ensuring crops stable yield, maintaining high yield and improving planting economic benefit in China.
结果表明，蔬菜地和华东稻麦轮作生态系统冬小麦田的NO和N_2O排放具有不同的季节变化规律。
The result showed that N2O and NO emissions from vegetable field and winter wheat field of rice-wheat rotation systems in southeast China had different seasonal variation rules.
在国家紫色土肥力与肥料效益监测基地上，研究了稻麦轮作制度下紫色土稻田生态系统中钾素的平衡状况。
Potassium(K) balance in purple soil rice field ecosystem under rice-wheat rotation were studied on the National Purple Soil Fertility and Fertilizer Efficiency Monitored Base.
稻—麦轮作期紫色土农田生态系统钾素平衡状况怎样？
Whether was potassium balance kept in purple soil cornfield ecosystem under a rotation of rice and wheat?
港口拖轮作业是港口服务系统的重要组成部分。
Tugboat operation is the important part of the service system of the port.
港口拖轮作业是港口服务系统的重要组成部分，拖轮的合理配置直接影响着到港船舶的数量和吨位。
Tugboat operation is the important part of the service system of the port, the rational marshalling of equipment directly affects the number and tonnage of the vessels arrived at the port.
应用渐开线-摆线复合齿轮作为采煤机的行走部，系统地阐述其形成原理及求出齿廓方程。
Applied the inviolate-cycloid compound gear as the walking organization for shearer, systematically elaborated it which formed the principle and extracted the tooth profile equation.
就整个麦豆轮作生态系统而言，旱地土壤分别是大气n_2o、CH_4的源汇。
Dryland soil is atmospheric N_2O source and is sink of atmospheric CH_4.
动量轮作为卫星姿态控制系统的关键执行部件，对其故障检测对维持卫星的正常运行具有重要意义。
Momentum wheel is a key actuator of the attitude controlling system of a satellite. Thus, it is very meaningful to accomplish its fault detection to maintain the working order of the satellite.
动量轮作为卫星姿态控制系统的关键执行部件，对其故障检测对维持卫星的正常运行具有重要意义。
Momentum wheel is a key actuator of the attitude controlling system of a satellite. Thus, it is very meaningful to accomplish its fault detection to maintain the working order of the satellite.
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