他连续5年在同一块地上轮流种植不同作物，研究人员称之为轮作。
He grew a different crop on the same field five years in a row, what researchers call crop rotation.
同样重要的是，开展对基础知识的低端技术研究，如庄稼轮作，在小型农场中发展动植物混养。
Equally crucial is lower-tech research into basics such as crop rotation and mixed farming of animals and plants on small farms.
我们的目的是探索为什么在熟地黄轮作中种植地黄后，芝麻的收成会急剧下降。
Our objective was to explore why Sesamum indicum yield declined severely when planted after Rehmannia glutinosa in crop rotation.
想提高产量，最好的办法是倒茬轮作。
农作物轮作技术已经介绍给农民们了。
The technique of rotating crops has been introduced to the farmers.
我就下到窑匠的家里去，正遇他转轮作器皿。
Then I went down to the potter's house, and, behold, he wrought a work on the wheels.
轮作耕种是许多热带国家常见的农场经营方式。
Shifting cultivation is a common type of farming in many tropical countries.
本文以标准渐开线直齿圆柱齿轮作为研究对象。
The standard involute cylinder gear is studied in this paper.
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.
水稻—蔬菜轮作的方式可减少有机氯农药污染的风险。
The rotation of vegetable and rice could decrease the risk of organochlorine pollution.
如果是中稻和小麦轮作，则可以只在水稻上施用锌肥。
Unde rotation of medium rice and wheat, zinc fertilizer could be only applied on rice.
豌豆是甘肃中部干旱地区重要的轮作、粮食和饲料作物。
The pea is an important rotation food and a forage crop in the central arid region of Gansu.
齿轮作为一种通用的传动机构，有其特殊的设计和加工方法。
As a kind of general driver machine, gear has its special method of designing and manufacturing.
轮作的四种作物是玉米、大豆、小麦和苜蓿，四年内每年种植一种作物。
The four crops grown in rotation are corn, soybean, wheat, and alfalfa, with one crop grown each year during the 4-year cycle.
凸轮作为一种通用的传动机构，有其特殊的设计和加工方法。
As a kind of. general actuating mechanism, CAM has its special method of designing and manufacturing.
本文对压缩理想气体和实际气体的离心式叶轮作了流场分析。
This paper presented the flow field analysis in centrifugal impellers compressing perfect and real gases respectively.
齿轮作为一种通用的传动机构，具有其特殊的设计和加工方法。
As a special kind of drive machine, gear has the special method of designing and manufacturing.
甘蔗和水稻，甘薯，豆类或黄麻等作物轮作，可以大大减轻受害。
Sugar cane and rice, sweet potatoes, beans or jute, crop rotation, can greatly reduce suffer.
有一项研究，在美国对于玉米与大豆轮作的11处土壤进行了研究。
One study examined 11 soils in the US under a rotation of maize and soybeans.
土壤中的螺原体在轮作和已经干燥的土中能存活8 ～17年。
The Spiroplasma could survive for 8-17 years in the rotation or dried soil.
叶轮作为泵的主要过流和能量转换部件，其决定了泵性能的好坏。
The impeller is mostly part of pump, so it decides the performance of pump.
用一个滚动轮作为鼠标中键的鼠标非常流行，所以增加了对它的支持。
Mice with a scroll wheel as a middle mouse button are fairly popular, so support is being added.
本文介绍了一种利用接触式导轮作为传感器的内环焊缝自动跟踪装置。
The automatic internal girth weld tracker using contact type guide wheel as sensor is introduced in this paper.
在北京潮土上研究了冬小麦-夏玉米轮作体系下土壤氮素反硝化损失。
Soil denitrification was studied in winter wheat-summer maize rotation cropping system with an aquic cambisol.
评估大地理区域内作物轮作水平是农业生产中必须解决的重要问题之一。
How to evaluate crop rotation level in large geographic area is one of the most important problems in agricultural production.
她的研究结果表明，减少排放要比只是减少氮肥的使用和改变作物轮作周期复杂得多。
Her results show that reducing emissions is more complicated than just cutting back on nitrogen fertilizers and changing crop rotation cycles.
梯牧草草地牛毛轮作草场对于饲养奶牛的主要价值，就在于其适口性好。
Much of the value of the timothy/meadow fescue ley for milk production is attributable to its palatability.
如果采用传统技术如轮作和堆肥为土壤补充氮和其他物质，就需要耕地也增长三倍了。
Using traditional techniques such as crop rotation, compost and manure to supply the soil with nitrogen and other minerals would have required a tripling of the area under cultivation.
1912年，安德列·雪铁龙开始用人字形齿轮作为雪铁龙公司产品的商标。
In 1912, Andre Citroen Citroen began employing shaped gear as a trademark of our products.
轮作是应用于有机农业上的一种简单而有效的技术，能减少农药的使用和提高土壤肥力。
Crop rotation is a simple and effective technique used in organic agriculture to reduce the need for pesticides and improve soil fertility.
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