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The first Chinese atomic device, which had been tested the month before on October 16, had a yield of 22 kilotons and weighed 1,550 kg, far too heavy for the DF-2A (when the 200 kg reentry vehicle aeroshell had been added). On December 13, the Defense Science and Technology Commission, which oversaw both the missile and nuclear bomb programs, demanded the reduction of the weight and size of the first operational atomic bomb in order to fit it on the DF-2 A.

中国人的首个核装置于一个月前，即10月16日进行了爆炸试验，2.2万吨的当量，重1，550公斤，远远超过东风2A的负载能力（考虑到还要加上200公斤的再入段弹头载具）。10月13日，负责监督导弹与核弹两个项目的国防科工委要求减少首个作战用核弹的重量和尺寸以便使其能够装入到东风2A上。1965年11月，两弹合一的导弹成功进行了飞行试验，但核弹头此时仍未完成改进。

Superposition of geographic information of the digital elevation model and maps of landscape genres is weighed to mirror the spatial distribution of the plant communities at different slops, aspects and position.

利用数字化地形模型与景观类型图进行地理信息叠加，以定量化地反映主要群落在不同坡度、坡向以及坡位的空间分布，获得各群落的分布结构，数量化研究地形因素与植被分布的关系。

Objective To investigate the effects of methyl tertiary butyl ether on the FOS protein in central nervous system of the rats. Methods 54 SD healthy adult-rats weighed 180~220g were involved in this study.

目的 通过研究甲基叔丁基醚对大鼠中枢神经系统Fos蛋白的影响，探讨MTBE对中枢神经系统急性毒作用部位。

First impressions were good: its triple monocoque structure, without forks, weighed only 1,100g.

第一印象是很不错的：前三角一体成型的架构，扣掉前叉仅重1100公克。

For comparison, a grain of sand weighed about 300,000 nanograms.

举个例子来帮你做比较吧：光一粒沙子就有约三十万毫微克重。

While the bots measured up to a few hundred micrometers in length, they were considered "nanoscale" because they weighed from only a few nanograms to a few hundred nanograms.

虽然这些机器人身体全长达几百微米，但它们仍被视为&纳米级&机器人，因为它们只有几毫微克到几百毫微克重。

At the endpoint, the thymus, spleen and uterus were weighed separately; the femoral dry weight, bone-calcium, phosphor, magnesium and hydroxyproline contents of femoral were measured; the histomorphological features of bone were observed and the biochemical indexes in serum (Ca, P, ALP, TRAP, E2, BGP) were determined after the mice were given SAR at the dose of 10, 30, 90 mgkg^(-1) respectively, and were compared with the model group, the normal control and the positive control. RESULTS: The osteoporosis of high turnover type was formed with feeding retinoic acid to experimental mice. Compared with the model group, the lessening of femoral dry weight, the short femoral transverse diameter, the decrease of bone mineral and bone-hydroxyproline of SAR groups were improved.

维A酸105mgkg^(-1致小鼠骨质疏松模型，SAR10、30、90mgkg^(-1灌胃给药，实验过程监测体重，2周后以比色法测定血清钙、磷含量和碱性磷酸酶、抗酒石酸酸性磷酸酶活性，竞争放射免疫法测定血清中骨钙素、雌二醇(s-E2)含量，处死动物后取脾、胸腺、子宫称重，取股骨进行骨组织形态学观察，测定并比较骨计量学和骨钙、骨磷、骨镁及骨弃脯氨酸含量。

After treatment, all animals were sacrificed, the tumor xenografts were weighed and the inhibitory rates were calculated.

用药结束后，处死裸鼠，取出肿瘤组织，称重，计算抑瘤率。

In some cases we may have to wait for better technology: early aircraft designers were mistaken to design aircraft that looked like birds, because they didn't have materials or power sources light enough the Wrights' engine weighed 152 lbs. and generated only 12 hp.

在有些情况下，我们不得不等待更好的技术出现：早期飞行器的设计者把飞行器设计成鸟儿的样子失败了，是因为他们没有足够轻巧的材料和足够强大的动力（莱特兄弟的引擎重达 153 磅，却只有 12 马力的输出），也没有精密的控制系统，能够让飞行器像鸟一样飞翔。

How such large creatures, which weighed in some cases as much as a piloted hang-glider (hang-glider: n.悬挂式滑翔机) and had wingspans from 8 to 12 meters, solved the problems of powered flight, and exactly what these creatures were-reptiles or birds-are among the questions scientists have puzzled over.

这种大型生物，有时候其重量相当于一个有人驾驶的滑翔机，且翼幅达到8到12米宽，是如何解决动力飞行问题，它们到底是何种生物－爬行动物还是鸟类，这些都是使得科学家迷惑的问题。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了