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In eutherian mammals, XCI is thought to be triggered by the expression of the non-coding Xist RNA from the future inactive X chromosome3, 4, 5; Xist RNA in turn is proposed to recruit protein complexes that bring about heterochromatinization of the Xi6, 7. Here we test whether imprinted XCI, which results in preferential inactivation of the paternal X chromosome, occurs in mouse embryos inheriting an Xp lacking Xist.

在最新一项研究中，美国北卡罗琳娜大学研究人员用小鼠胚胎（研究人员用基因工程方法使这些小鼠在其未来失活的X-染色体上含有一个有缺陷的Xist基因）所做的新的研究工作显示，实际情况更为复杂。

Point X is the Exclave of point A and could represent point A according to point Z.

点X作为点A的外飞地，对于Z而言X等同于A

Flower-like ZnO nanorods were prepared with the hydrothermal method and characterized by X-ray diffraction and scanning electron microscopy.

利用水热法合成花状的ZnO纳米棒，并对其进行X射线衍射（X-ray diffraction， XRD与扫描电子显微镜（scanning electron microscope， SEM 表征。

Objective Surgeon can bring surgical tool into correct position according to the image on the computer screen utilizing computer image process technology and X-ray fluoroscope from C-arm.

目的 利用计算机图像处理技术和手术前的C臂X射线影像资料，手术医生可以根据计算机屏幕所指示的手术路径正确实施手术，减少患者和医生的X射线辐射量，缩短手术时间。

It is a function of some variable x, which depends only on powers of x.

它是个有着一些变量的函数，它只依赖于x的幂。

Secondly, it could be that consciousness is not itself fundamental, but is necessitated by some more primitive fundamental feature X that is not itself necessitated by physics.

第二，可以是意识本身不是基础的，但被更原初的基础特征X所必要，而X本身不是物理所必要的。

The present results showed that PHA-L anterogradely labeled fibers originating from the SRD traveled through the dorsolateral funiculus and mainly terminated at the ipsilateral laminae Ⅳ~Ⅶ and X of the cervical and thoracic cords, In addition, P...

SRD的下行投射终未在脊髓中具有明显的同侧分布优势，主要终止在同侧脊历灰质的Ⅳ～Ⅶ层和X层，Ⅰ、Ⅱ层中只有少量的标记终末，对侧脊髓灰质中除了在Ⅳ层和X层中有中等密度的颁标终末分布外，其余各层中几乎无标记终未、PHA－L顺标终未与BSI-B4标记的初级传入C纤维终末在Ⅰ。Ⅱ层内重叠公布。本研究为SRD在调控脊髓的伤害性信息传递方面也起重要作用这一论点提供了直接的形态学依据。

The formation of chromium nitrides was analyzed with glancing angle X-ray diffraction spectrometry using a Philips(PW3710) XRD at Korea Basic Science Institute.

在韩国基础科学研究所运用飞利浦X射线衍射仪（PW3710）对铬氮化物的形成进行了掠射角X射线衍射光谱分析。

The unfolded spectra measured by soft X-ray spectrometer and transmission grating spectrometer are compared.

将软X光谱仪和透射光栅谱仪进行比对，由于软X光谱仪是绝对量测量，而透射光栅谱仪是相对测量，只能比较谱形。

Since grumpy cows are harder to move, it takes FJ a total of X+Y units of time to exchange two cows whose grumpiness levels are X and Y.

脾气越大的奶牛越难移动。交换两头"脾气指数"分别为X和Y的奶牛需要花费FJ

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。