空洞

These stars formed about four million years ago from the nebular material and their stellar winds are clearing a hole in the nebula's center, insulated by a layer of dust and hot gas.

在四百万年以前，星云物质聚集形成了这些恒星，它们的星风（一种从恒星不断向外运动的物质流，类似于太阳风）在星云中央清理出了一个空洞，这个空洞被一层尘埃和灼热气体所包围隔绝。

It was found experimentally that HIC happens via nonacid nucleation and then quasi-cleavage along {111} planes when C〓 is higher. Otherwise, in the case of lower C〓, hydrogen enhances ductile fracture via hydrogen-enhancing microvoid nucleation, growth and connection.

对预充氢的310钢薄膜进行TEM原位拉伸表明，当氢浓度较高时，氢致断裂通过空洞形核，然后沿{111}面准解理扩展的方式进行；当氢浓度较低时，氢促进纳米空洞形核、长大和连通，进而导致韧断。

At 2 weeks following injury, hematoxylin-eosin staining showed that brain tissue breakage at damaged site as scar connection, remarkable porosis in the blank group; typical morphological changes as neural cells at the transplanted site in the control group; typical morphological changes as neural cells without cavity in the experimental group.

伤后2周苏木精-伊红染色空白组可见损伤处脑组织断裂，为瘢痕连接，有明显空洞形成；对照组在移植部位出现典型的神经细胞样形态学改变；实验组出现典型的神经细胞样形态学改变且空洞消失。

Pulmonary cavity in AIDS is usually located in lower lung lobes,is 2～4cm in length,has thickened wall,smooth inner wall,rough outer wall,halo sign,and hila and/or mediastinal lymph node enlargement.CT morphology have prompted role for the diagnosis of AIDS,but correct diagnosis should combined with clinical date.

2艾滋病相关性肺空洞病变多位于下肺，病灶长径多为2～4cm，空洞壁厚，内壁光整，外壁毛糙，易出现晕征，淋巴结肿大多见，CT形态学对艾滋病的诊断有提示作用，确诊需结合临床。

By preparinga series of coordination polymer, the research works will increase more muchknowledge in porous material.

经由合成系列配位聚合物来探讨空洞材料的制备，其结果将丰富空洞材料领域的内容。

Here the temptation for hollow promises is greatest of all. The summiteers can make progress, but only if they temper their hyperbole with realism and humility.

可能只能是有一些空洞的承诺，参加峰会的领导人其实可以取得进展，只要他们愿意在空洞的话语中融合现实和谦逊的元素。

Results Main imaging findings of acute pulmo nary abscess were found to be dense ir regular patchy shadows,cloud -mass form high density shadows,mult iple spheroidal shadows,cavity formation with gas -fluid plane,contai ng gas cysts,mill...

结果急性肺脓肿主要表现为不规则斑片状浓密影，云团状高密度影，多发球形影，空洞及气液平面，含气囊肿，粟粒样小结节影及伴随以上病灶的胸膜增厚、胸腔积液等，其中空洞及气液平面，含气囊肿是其特征性表现。

The space between frequency bins is 8 sub-carrier spaces. Before the transmission of each data frame, secondary user use periodogram detection technology to detect spectrum hole, then transmit data on the spectrum hole by spectrum pool technology.

每帧数据传输开始时，二级用户利用周期图频谱检测技术对信道频段进行检测，获得频谱空洞，然后采用频谱池技术在频谱空洞上传输数据。

This thesis deduces the probability of a node to be a routing void node theoretically within deterministic deployed and random deployed WSNs, and gets the probability of encountering the routing void node while setting up a path randomly. Also a modified GF algorithm with backoff method to avoid the routing void nodes is presented.

本文从理论上分析了路由空洞在规则部署和随机部署情况下的存在概率，导出了随机部署情况下随机建立的路径遭遇到路由空洞的概率，并提出了一种带有退避改进方法的贪婪转发策略。

We should recall, however, that environmentalists have often been fobbed off with token gestures, idle talk and unimplemented treaties. Even President Bush, who has the worst environmental record of any American president so far, has mastered the art of environmentalist rhetoric.

当然，我们也不应该忘记，环保主义者常常被象征性的姿态、空洞的谈话与不履行的条约所欺骗，就连布什总统，这位在环保方面比历史上任何一位总统做得都差的人也掌握了说空洞的环保词藻的艺术。

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