In real competition, efficiency is necessary for survival.
在真正的自由竞争下，效率对生存来说是必须的。
The trick, Dr Smith suggests, is to cut patients' iron intake to the minimum necessary for survival.
史密斯博士的技巧是，将病人的铁摄入量减少到维持生命的最低水平。
But Dr Bechara said the insula appeared to be involved with "learned behaviours" rather than those necessary for survival.
但是，Bechara博士说，脑岛表现为与“学习行为”有关，而不是生存行为。
Males also perform better in navigation, and scientists have theorized that through evolution these kinds of abilities were necessary for survival when males had to seek food in unfamiliar terrain.
科学已通过进化推理当男性不得不在陌生的地域寻找食物时，这些能力对生存是有必要的。
The evaporation of chemicals is necessary for their survival.
化学物质的蒸发对它们的生存是必不可少的。
Exporting is necessary for our economic survival.
必须有出口，才能维持我们的经济。
Warm clothes and a blanket are necessary for our survival in the Sahara.
暖和的衣服和毯子是我们在撒哈拉生存所必需的。
These are necessary, though not sufficient, conditions for GM's survival.
但就通用汽车的生存而言，这些只是必要条件，而非充分条件。
Letting go of the survival tools I needed on the street was a necessary transaction for admittance to a better life.
抛弃街头的生存工具是进入更好生活的必要牺牲。
On the Web, usability is a necessary condition for survival.
在网络上，可用性是生存的必备条件。
These chemical compounds are not necessary for the primary survival of the tea plant's cells; they are what is known as secondary compounds.
这些化合物并不是茶树细胞生存所必需的物质，它们被称为次生化合物。
How to acquire the competitive advantage in this protean global market place? Timely reaction is of course a necessary condition for survival.
如何在瞬息万变的全球化市场环境下取得竞争优势，快速反应是生存的必要条件。
The reasonable exploitation of Marine resources and the protection of Marine environment is the necessary of mankind survival, is the common responsibilities and duties for all human.
合理开发海洋资源与保护海洋环境是维护人类生存的需要，是全人类共同的义务与责任。
Although they appear necessary for HIV's survival, precisely what they do that the virus needs is unknown.
尽管已经证实它们对HIV的生存是有必需的，但是确切的作用机理还不清楚。
Caring is just the first step, though. Next, people have to work together to achieve the social reforms necessary for our survival.
然而，关怀只是第一步，接下来，还需要人类团结起来为我们的生存作出必要的社会变革。
Early discovery, diagnosis and treatment are necessary to elevate survival rates and quality of life for young patients.
早发现、早诊断、早治疗是提高青年人直肠癌患者生存率和生活质量的关键。
But after the garden is planted trees, it is necessary for good conservation management to ensure survival and healthy tree growth and development to achieve the effect of green planning and design.
但是园林树木栽植后，需要良好的养护管理才能保证树木成活和健康地成长发育，达到绿化规划设计的效果。
For the survival of the community, food webs are necessary.
生存的群落，食物网是必须的。
This is necessary for the survival of natural persons "to eat."
这就是自然人生存所必须的“吃”。
Obama suggested he would support such a plan, so long as it was accompanied by conditions to "keep the automakers' feet to the fire in making the changes that are necessary" for longer-term survival.
奥巴马表态他将支持这样的计划，只要同时有条款让汽车制造商在进行必要的变革以获得长期生存能力时承担着一定的压力。
Narcissism is reviled as a pathological state, but Mark Vernon argues that it may be necessary for our emotional survival.
人们把自恋批为一种病态心理，然而马克·佛农称，自恋或许是人类存有情感的必然。
It is the product of historical development is based on the survival and development necessary for freedom, equal rights.
它是汗青开展的产品，是基于保存和开展所必需的自在、对等权益。
It is the product of historical development is based on the survival and development necessary for freedom, equal rights.
它是汗青开展的产品，是基于保存和开展所必需的自在、对等权益。
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