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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

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。

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

The great hooded fireplace is Indiana limestone: 14' tall x 6' wide x 3' deep.

这个巨大的带头巾的壁炉印地安那州的石灰石：14 '高×6英尺宽x 3 '深。

X-linked ichthyosis is a sort of sex linked recessive inherited diseases. It is one of the most common congenital metabolic diseases of the mankind.

X-连锁鱼鳞病(X-linked ichthyosis， XLI)是隐性遗传病，是人类最常见的先天性代谢疾病之一。

Ghost creates an image file using a buffer of size x where x = number of KB.

Ghost使用大小为x KB的缓冲区创建映像文件。

The thermal and magnetic hysteresis is observed in the (1-x)La2/3Ca1/3MnO3/ xCu(NO3)2 system. Using the assumption of the "MM/ML/MM"structure, we give the qualitative indicant about these phenomena and the LFMR effect.

分析了(1-x)La_2/3Ca_1/3MnO_3 / x Cu(NO_3)_2体系中的热滞和磁滞现象，并用"磁性金属/中间层/磁性金属"结构假设，定性解释了这些现象和体系中的低场磁电阻效应。

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。