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This conclusion, combined with the data obtained from the short-lived Hf-W and Sm-N d isotopic systematics, suggests that the Moon was initially accreted at 4.5 Ga, followed by development of the global lunar magma ocean. The primary lunar crust is composed by ferroan anorthosite which was produced by flotation of plagioclase during crystallization of the LMO. However, the mafic minerals, coevally crystallized with the plagioclase, sank to the base of the LMO due to their high density, and made up the main part of the lunar mantle, which served as the source during later mare basaltic magmatism.

根据这一年代资料,结合对月岩样品进行的短半衰期Hf-W与Sm-Nd同位素体系的研究结果,认为月球大致形成于45亿年,其后开始由岩浆海导致的内部核-幔-壳的分异,岩浆结晶的低密度斜长岩构成最初的月壳,而密度大的岩石构成月幔,而此月幔则成为后来月海玄武岩的主要岩浆源区。

"I'm youth, I'm joy," Peter answered at a venture,"I'm a little bird that has broken out of the egg."

"我是少年,我是快乐,"彼得信口答道,"我是刚出壳的小鸟。"

In ovary, PNA receptors appeared in the oocyte cytoplasm of second phases of oogenesis; the positive granules gradually increased from third to forth phases, and they exhibit a maximum expression before vitellogennic stage in cytoplasm of oocyte; from vitellogennic stage to chorionation stage, the positive granules gradually reduced. Binding sites on follicle cells were changed with their morphological variation in every stage of oogenesis.The staged and specific expression of oncogene c-kit, the tyrosine-kinase receptor, is closely related with gametogenesis.

2在中华蚱蜢卵子发生的早期,PNA受体是由卵母细胞自身合成;在卵黄发生前的准备时期,卵母细胞质中的PNA受体一部分来源于自身合成,另一部分则来源于滤泡细胞,而糖复合物的大量出现可能直接与卵黄发生有关;卵黄发生期PNA受体的减少可能是在卵黄物质形成中部分发生了修饰;卵黄和卵壳的相继形成过程中,阳性反应的出现说明PNA受体参与了卵黄膜及卵壳的形成,而这些受体物质是由滤泡细胞分泌的。

At each penton, a hole (φ=20〓) can be seen connecting the inside and the outside of the capsid, and there is a hole (φ=12〓) at each hexton and the center of 2-fold axis, so there are 132 holes in total at the surface of CSBV.

应用冷冻电镜技术和计算机三维结构重构的方法,我们测定了CSBV核衣壳的三维结构,分辩率为25 〓,病毒的核衣壳是按T=1(P=3)的对称结构排列二十面体,病毒表面比较光滑,有12个五邻体、60个六邻体的结构,每个五邻体的中央有孔洞,六邻体的中央也有孔洞,另外在2次轴的位置上也有孔洞,这样病毒共有132个孔洞,五邻体的孔洞的直径为20 〓,而六邻体和二次轴的孔洞的直径月为12 〓。

Wind up (i是发字母i本身的音,不是wind风那个音) If you wind up in a particular place, situation, or state, you are in it at the end of a series of actions, events, or experiences, even thought you did not originally intend to be.比如If he continues to spend money this way, he's going to wind up in bankruptcy. How did you ever wind up in this little town in the middle of nowhere?9. Someone is playing a shell game , Bruce. I'm just trying to find out who.

shell game原指一种大家都知道的游戏——藏豆赌博游戏:一种通常涉及赌博的游戏,一个人将一个小物体藏在三个坚果壳、杯子或茶杯中的一个里,然后当旁观者试图猜测物体的最终位置时,这个人在平坦表面上移动果壳、杯子或茶杯以变戏法也作thimblerig,后来可以泛指类似的骗局,不一定是藏豆子,本句里就在说Bruce搞的藏史高飞等人的游戏

The invention discloses a support device for an air conditioning faceplate, which is arranged between a front faceplate of a suction inlet of a suspender air conditioning and an air conditioning casing, comprising a support component and a drive motor, wherein, the support component is a cross drive lever component formed by two connecting levers which are connected with each other with freely rotated middle part in a scissors shape, comprising a driving lever and a driven lever, wherein, the driving lever passes through the middle part of the driven lever; the middle part of the driving lever is rotatablely fixed in the middle part of the driven lever; the driving lever is driven by a step motor, has one end fixed on the step motor and the other end fixed in a chute of the faceplate capable of sliding in the chute; and one end of the driven lever is connected with a hook of the faceplate, and the other end of the driven lever is arranged in the chute of the casing and can slide in the chute.

本发明公开了一种空调面板支撑装置,设于挂式空调吸入口的前面面板和空调罩壳之间,包括支撑构件和驱动电机,所述的支撑构件是由中间部转动自由地相互连接的两连杆构成的呈剪刀状的交叉传动杆组件,包括主动杆和从动杆,主动杆从从动杆中部穿过,主动杆中部可转动地固定在从动杆中部,主动杆由步进电机驱动,一端固定在步进电机上,另一端在面板的滑槽中,可以在滑槽中滑动,从动杆一端与面板的挂钩连接,另一端在罩壳的滑槽中,可以在滑槽中滑动。

A regulation valve of a two-stage turbocharging system is arranged into the high pressure turbine volute to reduce the system sizes. Matching calculations for the turbocharging system and a diesel engine are made. Calculations in designing of two turbine volutes and regulating valve were taken. Experiments are conducted with the designed system.

为获得结构更为紧凑的二级增压系统,提出了将调节阀集成在高压级涡轮壳内部的二级增压系统结构方案,进行了增压系统与柴油机的匹配计算、两个涡轮壳的设计计算、调节阀计算以及流动分析,并对所设计的二级增压系统进行了试验研究。

First acts according to the igniter plug iron casing the product detail drawing, the production scale and the concrete working condition, had determined the design craft principle, formulates some feasible craft plans, and has carried on the analysis to each kind of plan, finally selected set of best reasonable crafts plans - to use the bean material: The multi- locations cold extrusion takes shape.

本文主要介绍了火花塞铁壳挤中径工序的冷挤压模具设计全过程,给出了具体的设计方法与步骤。首先根据火花塞铁壳的产品零件图,生产规模及具体生产条件,确定了设计的工艺原则,制定一些可行的工艺方案,并对各种方案进行了分析,最终选出了一套最佳合理的工艺方案——豆料:多工位冷挤压成形。

The temperature and stress in valve housing of medium cylinder in super critical steam turbine during cold start and under nominal load were calculated with FEM cord NASTRAN.

采用大型有限元分析软件NASTRAN,对超临界1000 MW汽轮机中压缸主汽阀阀壳的冷态启动过程和额定工况下的温度场和应力场进行计算,得到了冷启动过程中阀壳的温度和应力分布规律,并将冷启动结束时的计算结果同额定工况下的计算结果作一对比分析。

Already the Mehrgarh people used domesticated wheats and barley and the major cultivated cereal crop was naked six-row barley, a crop derived from two-row barley.

美赫尕尔的人们已经使用驯养的小麦和大麦,还有培育的主要农作物是六排去壳的大麦,还有一株源自两排的去壳大麦。

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Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。

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