气候上

He will chair a summit on climate change, thank countries that have contributed to UN peacekeeping missions, meet African leaders and in general reinforce the message that America is at last under the management of an enthusiastic multilateralist (putting trade to one side, perhaps).

他将主持一场气候变化峰会，感谢为联合国维和行动做出贡献的国家，与非洲国家领导人举行会晤，并总体上强调美国最终还是处于一个满腔热情的多边主义者的领导之下。9月24日，他同样将主持一场安理会会议，讨论核扩散以及裁军问题。

Multiple cropping system is a special characteristic of agriculture in China, which has crucial function on feeding 22% people of the whole word by 10% cultivate field of the whole world.

中国农业能以占世界 10%的耕地养活世界上 22%的人口，多熟种植起着决定性的作用。复种指数作为耕地耕作能力的主要指标以及气候农业生产模型中的必需变量，一直是基于行政单元的统计，存在较多的问题，不易于评价与研究。

U.S. President Barack Obama and Chinese President Hu Jintao have pledged to work together on climate change, nuclear disarmament and other global issues.

美国总统奥巴马和中国国家主席胡锦涛承诺将在气候变化、核裁军和其他全球问题上进行合作。

For all China's increased assertiveness internationally over the past year (including its obduracy at climate-change negotiations in Copenhagen last December and heavy sentencing of dissidents despite Western appeals for clemency), it does not want to be seen as a potential military threat.

国际上对于中国在过去的一年整张军事预算的武断言论（在去年12月的哥本哈根，包括其顽固的气候的谈判，对量刑的加重处理尽管西方呼吁要仁慈对待），它不希望被视为一个潜在的军事威胁。

A spate of recent events, from the heavy jail sentences passed on human-rights activists to an undiplomatic obduracy at the climate-change negotiations in Copenhagen last December, invite questions about the thinking of China's leaders.

最近大量事件，从对人权激进分子的很重的入狱处罚到上年12月份在哥本哈根举行的气候变化会议上的毫无外交策略的顽固不化，引起人们纷纷质疑中国的领导层到底在想什么。

Climate in the early Pleistocene1 varied with a period of 41 kyr and was related to variations in Earth's obliquity.

过去300万年是一个气候剧变的时期，地球上的状况在寒冷的冰川期和温暖的间冰期两个极端之间交替。

Second, the Obama administration has specific reasons to be less accommodating to China because of Beijing's recent assertiveness, such as its uncooperative behavior at the Copenhagen climate change summit, obstructionism on sanctions against Iran, and intensified repression of dissent at home.

第二，由于北京最近的专横（assertiveness，没有"专横"那么重，是自己很有主张的意思，想不出合适的中文词），诸如在哥本哈根气候会议上的不合作态度，对制裁伊朗的阻碍，在国内加强压制不同意见，奥巴马政府没有什么理由对中国另加青眼。

The president made a speech at the opening ceremony of the sports meeting, which

B 刚来的人发现自己无法适应这片新国土上的气候，无法永久定居下来。

The coring was successfully operated on the winter ice-cover of the lake in 2000 and the pioneer practice of the ""off-the-ice"" coring proves to be very useful and economic for taking quality cores from lakes in northern China.A multidisciplinary investigation has been carried out on core HQH4, one of the three 11-m-long cores. Results from previous investigation include lithostratigraphy, radiocarbon dating, paleoecology of Ostracoda, stable isotopic record of ostracod shells, total nitrogen and organic carbon, C/N ratio, 81 C of organic matter etc.

在对深度为11米的HQH4岩芯开展了~(14)C年代学、岩性地层学、介形类古生态及介壳稳定同位素、有机碳和总氮及C/N比值、有机碳同位素等多学科综合分析测试和研究工作的基础上，本硕士学位论文研究侧重开展了：1HQH4岩芯烧失量(Loss-on-ignition)的系统分析测定及该地层学变量的古湖泊和环境变化意义的研究；2沉水植物川蔓藻化石种子生态学特征及其在黄旗海湖泊水位重建和气候变化研究方面的重要意义的研究。

The world is overpopulated and it's unsustainable as natural resources are running out and climate change is adding to the problem.

世界上的人口已经太多了，已经超过地球的承受能力。自然资源消耗怠尽，气候问题更是加重了问题的严重性。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！