世界正面临着人口增长，同时供给和生产又被气候变化、供水保障和技术缺乏等因素限制着，特别是对于小农来说。
The world is confronting population growth, while supply and production is constrained by climate change, water scarcity and lack of technology, especially among smallholder farmers.
就神经氨酸酶抑制剂而言，有一些重大的限制因素，主要是生产能力有限，同时，在许多国家，其价格高得难以负担。
For the neuraminidase inhibitors, the main constraints - which are substantial - involve limited production capacity and a price that is prohibitively high for many countries.
不可预见性也是限制各公司和各国从事多种高附加值生产的一个主要因素。
Unpredictability is also a major constraint for companies and countries trying to diversify into higher value production.
在我国，尤其是北方，干旱是农业生产最严重的限制因素。
In China, especially in North China, drought is the most serious limiting factor for agricultural production.
旱地农业生产的主要限制因素是水分亏缺和土壤贫瘠。
Water deficit and soil infertile is the main limited factor in arid agricultural production.
水分缺乏是农业生产的重要限制因素。
Water shortage for crops is the key limiting factor in agricultural production.
这一世界上最大的航空公司关注从达拉斯到中国大陆的服务项目，但是却被成本结构、劳动力条件、飞机类型和生产可持续性提供的航班这些因素所限制。
The worlds largest airline had eyed services from Dallas to greater China but was limited by factors including cost base, Labour conditions, aircraft type and product to sustainably offer flights.
在全球许多地区，干旱胁迫已经成为限制小麦生产的主要因素。
Drought stress has been the main factor of limiting wheat yield.
它前所未有地改变着人类的生产生活方式，跨过地域与时间的限制，将人类连接成一个紧密的整体，成为人们工作和生活中一个重要因素。
It is an unprecedented change in the production of human life, across geographical and time constraints, the human connection into a coherent whole, as people work and live in an important factor.
磷素是红壤地区农业生产的最重要的限制因素，因此红壤磷素形态与转化问题的研究，对红壤地区农业生产具有重要意义。
Phosphorus(P) is the limiting factor for agricultural production in red soil regions, so the study about P forms and transports can be meaningful to agricultural production in red soil regions.
但样本县因人口密度过小、耕地生产率低下等因素限制了对公路运输的有效需求。
But factors such as low population intensity and low land productivity restrict the efficient demand for road transport.
在实际生产中，不考虑价格因素，筒子架的大小受到两方面的限制。
In practice, and not considering purchase price, the creel size is limited by TWO factors.
践踏造成的损害会迅速成为生产率的限制因素。
Damage from poaching can rapidly become a limiting factor to productivity.
目前，用微生物菌体转化生产d -型氨基酸的工艺路线已经产业化，但天然菌体转化工艺存在一些限制因素，阻碍了D -型氨基酸的扩大生产，导致产品短缺。
However, the yield of D-amino acids has been tempered by some limited factors from strain per se resulting in the shortages of that goods in the markets.
根据土地质量诸因素对甜菜生产的适宜性、限制性将评价因素划分5个等级。
The evaluating factors could divided into 5 scores according to the suitability and restriction of the various factors of soil quality to sugar beet production.
缺乏可靠的VAM体外培养方法仍是限制供农业上大范围的VAM接种剂生产和质量控制的因素。
Lack of reliable methods to propagate pure cultures of VAM in vitro remains a constraint to production and quality control of VAM inocula for large-scale agronomic use.
由于常规农药对枯萎病防效甚微，并且抗病性品种缺乏，枯萎病已经成为制约黄瓜生产的限制性因素。
Due to the lack of effective chemical fungicides and resistant varieties, fusarium wilt has become the limiting factor in cucumber production.
水稻是主要粮食作物之一，干旱是限制水稻生产的主要因素之一，种植水稻抗旱品种、进行水稻节水栽培是节水农业的重要组成部分。
Planting drought resistance rice varieties and carrying out water-saving cultivation are the important components of water-saving agriculture, and the development trend of modern agriculture.
对于水灌溉农田而言，涝害和干旱是水稻产量的主要限制因素，并且涝害和干旱胁迫可以在同一季水稻生产过程中相继发生。
Submergence and drought are major constraints to rice (Oryza sativa) production in rain-fed farmlands, both of which can occur sequentially during a single crop cycle.
本文应用灰色系统理论中的灰色关联度分析法，对影响放牧绵羊生产性能的主要营养限制因素进行了研究。
In this paper, the grey system analysis were used to study the nutritional limitations affecting the productive performance of the grazing sheep.
干旱是玉米生产的主要非生物限制因素。
Drought is the most widespread abiotic constraints in maize production.
干旱是限制农业生产的重要因素之一，解决干旱问题的重要途径之一就是提高作物自身的抗旱性。
Drought is one of the severe constraints on farming. One of the important pathway in the resolution to drought is to increasing the drought tolerance of crops.
但我国的春萝卜生产还存在许多限制因素，其中最为突出的是先期抽薹。
The premature bolting is a destructive problem which causes lots of yield loss and low quality especially in the spring planting.
但我国的春萝卜生产还存在许多限制因素，其中最为突出的是先期抽薹。
The premature bolting is a destructive problem which causes lots of yield loss and low quality especially in the spring planting.
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