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IRRITATION AT PACE OF US-CHINA MEETINGSBy Krishna Guha in WashingtonWednesday, May 23, 2007The US is growing impatient at the pace of progress in economic talks with China

本周三是在巴黎召开的为期三天的国际会议的第一天，一位联合国官员说道，至少需要2500万美元来救助大猩猩、黑猩猩这样的大型类人猿免于灭绝。

Two weeks after this photo, the leaves of the gunnera can shelter us from the sun or from the rain, it's according to.

二周在这之后照片，或者从那些雨那里那些叶子的那些gunnera保护我们免于那些太阳能，它根据。

Owing to its position, it had escaped the destruction of Henny's things that had followed her death.

由于它所处的位置限隐蔽，它得以免于由于翰尼舅妈的去世而被销毁的命运。

The perils of the final conflict for the Hollin Gate still wait for you, as do the legendary artifacts you'll need to overcome them.

它伟大的气势无不充满宏伟和神秘感，它本身也免于毁灭。

This situation is important to maintain pregnancy through avoidance of the rejection of the immunologically incompatible fetus.

保证换孕期免于免疫性相矛盾拒绝的胎儿是很重要的。

"African stonemasons also were skilled at mortarless work, and Japanese mortarless castle walls resisted collapse during earthquake s."

非洲石匠也擅于无砂浆作品，而日本的无砂浆城堡墙壁能在地震中免于崩塌。

"African stonemasons also were skilled at mortarless work, and Japanese mortarless castle walls resisted collapse during earthquakes."

非洲石匠也擅于无砂浆作品，而日本的无砂浆城堡墙壁能在地震中免于崩塌。

"African stonemasons also were skilled at mortarless work, and Japanese mortarless castle walls resist ed collapse during earthquakes."

非洲石匠也擅于无砂浆作品，而日本的无砂浆城堡墙壁能在地震中免于崩塌。

Finally, in multinuclear macrocyclic polyamine derivatives, we found that cyclen-based oligomers form polymer complex with DNA, thus protect DNA from enzymatic degradation efficiently.

在多核大环多胺方面，我们合成了基于大环多胺的寡聚物，研究发现该类物质可与DNA形成复合物，从而有效地保护DNA免于酶解。

Majority of acute leukemias in infant, either acute lymphoblastic leukemia or acute myeloblastic leukemia, posses a chromosomal translocation affecting the 11q23 chromosome region which specifically inoles the mixed-lineage leukemia gene.1-3 Most pediatric leukemias with MLL rearrangement clearly hae a remarkably short latency.1,4 MLL gene rearrangement is also associated with secondary leukemias of patients preiously treated with the topoisomerase II inhibitors.4 The latency of these secondary leukemias is similarly ery short.4 Of note, the concordance rate of leukemia with MLL rearrangement in infant monozygotic twins approximates to 100%,1,4 and identical breakpoint in the MLL gene was shared in these pairs of identical twin infants with concordant ALL.1,4 Moreoer, the unique and clonotypic MLL fusion gene was detectable in neonatal blood spots for Guthrie cards from non-twined indiiduals who subsequently deeloped ALL.1,4 These obserations indicate not only that MLL fusion is generated in utero but also that MLL fusion proteins could be capable of inducing leukemic transformation with few, if any, secondary mutations.2,3,4 Greaes et al speculate that an MLL fusion protein somehow promotes rapid transition to full-blown disease in patients ia ery rapid clonal expansion, genetic instability, or inhibition of DNA damage repair.4 In general, for clonal expansion of malignancies, tumor cells often hae acquired strategies that escape immune sureillance of the hosts.5,6 Immune escape mechanisms also contribute to the failure of graft-ersus-leukemia effect after allogeneic hematopoietic stem cell transplantation.7 Therefore, leukemia cells could acquire some immune escape mechanisms during leukemogenesis.

绪论 绝大多数的婴儿白血病，不管是急性淋巴性白血病或是急性骨髓性白血病，在染色体11q23部位有染色体易位的情况；这个部位的染色体易位牵连了混合谱系白血病基因。大多数具有MLL基因重排的儿童白血病潜伏期明显短很多。MLL基因重排也和经拓扑异构酶II抑制剂治疗后的继发性白血病有关。这些继发性白血病的潜伏期类似地都非常的短。很重要的是，单卵双胞胎婴儿同时患有或同时免于MLL基因重排阳性的白血病的一致性接近100%；并且同样患有ALL的同卵双胞胎的MLL基因的断裂点是一致的。而且，这种独特的克隆特异性的MLL融合基因能够从那些得ALL的非双生个体出生时的血斑标本中检测到。这些发现表明MLL融合基因产生在胎儿还在子宫的是后，而且MLL融合蛋白能过和其他的基因突变一起诱导白血病的产生。Greaes 等推测MLL融合蛋白在某种情况下同过快速克隆增殖，遗传的不稳定性或是DNA损伤修复的抑制促使疾病迅速地全面爆发。恶性肿瘤细胞的克隆增殖通常已经获得了逃避机体免疫监视的能力。免疫逃避机制也归因于异体外周血干细胞移植后移植物抗白血病作用的失效。所以，白血病细胞在白血病的产生过程中可能获得了某些免疫逃脱机制。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。