自然发生

It has been shown that small but measurable variations occur naturally in the isotopic composition of copper.

研究证明，细微但仍可测量到的差异会自然发生在铜的同位素构成中。

Trees, lofty, emergent, with grayish brown to orange flaky, prominently lenticellate bark and aromatic oily white resin, with stout buttresses.

乔木，极高，自然发生的，具浅灰色棕色到橙的片状的，具显著地皮孔的树皮和芳香的含油性白色树脂，具坚固板根。

CM serves as a forum for the exchange of information on etiopathogenesis, epidemiology, diagnosis, therapy, and prevention of infectious and noninfectious diseases of laboratory animals; naturally occurring and induced models of human disease; research applications of animals; and the biology of laboratory animals.

比较医学》作为一个论坛，致力于关于发病机理，流行病学，诊断，治疗和预防实验室动物的传染和非传染疾病，自然发生和外因导致的人类疾病模式，动物研究应用和实验室动物的生物学等方面的信息交流。

By using β-NADPH-diaphorase histochemical staining technique,wefound for the first time that NOS activity was detected in the epithelium of airpathway and endothelium of vessels but was not detected in the small vessels(ID＜100μm),and the NOS express in pulmonary vascular endothelium of preascitic andascitic broilers were elevated,especially in the endothelium and smooth muscle layer ofsmall vesseles with thicker walls and of muscularized nomuscular artery in asciticbroilers.

本研究从田间自然发生腹水症的肉鸡群中选取正常肉鸡、亚临床腹水鸡和腹水鸡为实验对象，通过比较这三种肉鸡血流动力学、心电图、动静脉血血气、肺外动脉舒张反应性、肺血管结构以及肺组织一氧化氮合酶的活性和分布等方面的不同，探讨了肺动脉舒张能力在肉鸡肺动脉高压形成中的作用和机制。

Observation of spontaneous occurrence of 2n pollen in a fewC itrusspec ies confirm ed the existence of unreduced pollen in them.

试验中初步观察了柑橘属部分品种的2n花粉自然发生情况，证实了柑橘属内未减数花粉的存在。

Mark 2:21-22) The unshrunk cloth represents a new way of being that naturally occurs when you hear, understand, and apply the word of God in your everyday life.

(马克2：21-22) unshrunk布是一种新的方式，是自然发生的，当你听到，了解并运用上帝的话，对您的日常生活。

The pilot study shows that the ammonia dissociation/synthesis reaction is inherently free of any potential side reaction problems, and also offers phase separation of products. The carrier of heat store is liquid. and is very interesting for long-term storage as it can be carried out at room temperature with no energy losses, Its theoretics energy storage density reachs 66.5kJ/mol, which outclasses sensible or latent heat storage. In comparison to other thermochemical energy storage, ATCES needs lower temperature in endothermic reaction(only 650℃), but It can produce over 550℃ high temperature stream in exothermic synthesiser. Furthermore, the heat store/recovery can change with adapt to the heat source/load automatically, and offers coninuous(24 h) production of heat, These advantages will see a rapid increase in the adoption of large-scale concentrating solar thermal power generation.

初步研究表明：采用氨基储能体系，储/释过程无副反应，且储能介质能自然发生相分离；储热载体为流体，并可在室温下长期无热损储存，理论储能密度达66.5kJ/mol，远高于显热或相变蓄热；与其它热化学储能相比，吸热反应温度低，仅需650℃，而放热反应可产生500℃以上的高温，能量的储/释流量可随热源/负荷自适应变化，且可全天供热，更适合作为聚光式大规模太阳能热力发电中的能量储存系统。

The process of artificially altering the colour to green involves irradiating which can also occur naturally.

过程中人为地改变颜色，绿色是自然发生的，也可以射。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

In photodynamic treatment, a photosynthesizing agent (such as a porphyrin, a naturally occurring substance in the body) is injected into the bloodstream a few hours prior to surgery.

在光动力治疗， photosynthesizing剂（如一个卟啉，自然发生的物质在人体内），注入到血管几个小时之前手术。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。