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Schwannomas are typically benign, slow growing tumors that arise from the schwann cells, which envelop and myelinate cranial, spinal, and peripheral nerves.

神经鞘瘤是典型的良性、缓慢生长的肿瘤，起源于许旺细胞，包绕并形成颅内、脊髓以及周围神经髓鞘。

Its private-sector origins (despite initial federal funding) have made the Internet nonbureaucratic, particularly compared with state-run monopoly telecom carriers.

其起源于私人部门（尽管最初是由联邦提供资金的）也使得互联网与国家经营的垄断性电信服务商相比，没有官僚主义色彩。

The phylogenetic analysis of these two nonmarine crabs together with intertidal, supratidal and swimming crabs based on portions of mitochondrial 16S rDNA sequences suggested that Grapsioidea, Ocypodoidea, Potamoidea and Portunoidea arose from a common marine ancestor, and the estimated divergence time are similar.

基于线粒体16S rDNA部分序列，对这2个类型的非海洋蟹类与潮间带蟹类、海洋蟹类之间的系统发生分析提示，方蟹总科、沙蟹总科、溪蟹总科和梭子蟹总科的蟹类起源于一个共同的海洋蟹类祖先，它们彼此之间的歧异时间基本一致。

However, odontogenic tumors or cysts may originate from residual cells, although little is known about how HERS proliferates and disappears.

虽然对于HERS细胞的增殖及消失了解甚少，但牙源性肿瘤或囊肿可能起源于上皮剩余。

Orthology describes genes in different species that derive from a single ancestral gene in the last common ancestor of the respective species.

指的是这样一些基因，它们起源于这些基因所在物种的最近的共同祖先的一条基因。

Ortholog的定义是: Orthology describes genes in different species that derive from a single ancestral gene in the last common ancestor of the respective species.

即，Orthology指的是这样一些基因，它们起源于这些基因所在物种的最近的共同祖先的一条基因。（有点拗口，但也想不出更好的译法了

The pankration was a combination of boxing and wrestling, where gouging and biting were forbidden.

古代奥运项目＇pankration＇起源于公元前648年，它要求哪两项技能？拳击和摔跤。

But he accepts this model still does not explain how life actually began in the first place.The professor and his late colleague Sir Fred Hoyle championed the so-cllaed "panspermia" theory from the 1960s.

他表示，天文学证据可以绝对支持这一观点，即地球上的所有生命体并非起源于地球，而是来自外太空，虽然我们目前尚不知晓最初的生命是如何产生的，但一旦产生便可在宇宙中繁殖。

Glomus jugulare tumor is a rare neoplasm arising from the paraganglion and it purses an aggressive ability and lower grade biological behavior.

颈静脉球瘤是一种起源于副神经节的少见肿瘤，呈侵袭性生长，有低度恶性的生物学行为。

The possible reason is that doped Zr〓 ion enters the interstitial sites for its small ionic radius and no dipole complexes were formed. Monovalent ion F〓 has been reported to improve the scintillating performance greatly. Our results show that Agrand diagrams of F〓: PWO crystals obey an modified Cole-Cole equation. The crystals present similar dielectric relaxation phenomena to but have much higher activation energy than that of RE〓: PWO crystals, which originate from the 〓 dipole complexes. The co-doping of trivalent Y〓 and pentavalent ion Nb〓 does not always show a better scintillation performance than that of solely doped samples, which could be attributed to the existence of the 〓 dipole complexes, which counteract the solely doping effect.

而Zr〓由于离子半径太小，可能进入间隙位置，不形成类似的偶极缺陷；一价负离子F〓的掺入提高了晶体闪烁性能，阻抗谱测试结果表明F〓：PWO晶体Argand图符合修正的Cole—Cole方程，晶体同样表现出介电弛豫现象，并具有比RE〓：PWO晶体中高得多的弛豫激活能，可能起源于形成的〓偶极缺陷；Y〓和Nb〓双掺的PWO晶体并没有显示出两种离子单掺优点的叠加，阻抗谱测量结果表明，在双掺晶体中可能形成〓偶极缺陷，使两者掺杂作用相互抵消。

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。