原始细胞

Marine sponges are the most primitive multicellular animals and belong to the sessile filter feeder.

海绵是最原始的多细胞动物，属于海洋中营固生生活的一类群体动物。

Primordial germ cells were the progenitor cell of spermatozoon and ovum.

原始生殖细胞是精子和卵子的前体细胞。

Megaspore development and abortion of"Pingyi Tiancha"Compar-ing with regular developing megaspore of normal M.baccata,the megasporemother cellof"Pingyi Tiancha"could form mono-nucleus embryo sacby perhaps irregular meiosis,then most of sexual MES depauperatedand degenerated,finally aborted,or only a few further developed.Of asexualembryo sac,one or more large cells at the chalazal end of nucellus developed in-to one to more asexual embryo sac initials.After the competition between sexu-al embryo sacand asexual embryosac,most ovules only had one asexual embryo sac matured.

平邑甜茶大孢子的发育和败育与正常发育的山定子大孢子对比，平邑甜茶大孢子母细胞经减数分裂能形成单核胚囊，之后多数有性胚囊萎缩、退化而败育，只有极少数进一步发育；而无性胚囊则从胚珠合点端1个或多个较大的珠心细脆形成并首先发育为一个或多个无性胚囊原始体；经过有性胚囊和无性胚囊以及无性胚囊和无性胚囊之间的竞争，多数胚珠只有一个无性胚囊成熟。

Today, there are still some meningitidis bacteria, four cocci, streptococcus and staphylococcus, which is the most primitive multicellular organism.

今天仍有一些细菌是双球菌、四球菌、链球菌和葡萄球菌，这些就是最原始的多细胞生物。

An endodermal sinus tumor of the testis is shown composed of primitive germ cells that form glomeruloid or embryonal-like structures.

睾丸的内胚层窦肿瘤由原始生殖细胞构成，这些细胞形成血管球或胚芽样结构。

It publishes two journals: Folia Biologica for original papers in molecular and cell biology, and Biologicke Listy for review articles in Czech on various aspects of modern biology.

该所出版2种杂志，即发表分子与细胞生物学领域原始研究论文的《Folia Biologica》，和发表捷克现代生物学各个领域综述文章的《Biologicke Listy》。

Amplified cells were cultured in PGC culture medium and non-adherence culture flask till idiosome formed, adhered and differentiated.

体外分化采用无黏附特性的培养瓶和除去白血病抑制因子的原始生殖细胞培养液，以脱饲养层法悬浮培养扩增的细胞，直到拟胚体形成及贴壁分化。

CCSK is a rare type of renal neoplasm in childhood and its diagnosis relies mainly on histopathology and immunohistochemistry. It is important to be familiar with the morphological variants of CCSK to avoid confusion with other similar lesions, such as Wilm's tumor, congenital mesoblastic nephroma, malignant rhabdoid tumor of kidney, primitive neuroectodermal tumor.

CCSK是一种罕见的儿童期恶性肾肿瘤，诊断主要依靠组织病理学和免疫组化，熟悉其形态学变异有利于与其它类似病变如肾母细胞瘤、先天性中胚叶肾瘤、肾恶性横纹肌样瘤、原始神经外胚叶肿瘤等鉴别。

Primitive, solid, skeletal structure derived from specialized mesodermal cells.

脊索，一种动物体在未形成脊柱以前的细胞组织，状如绳索，为胚胎时期的原始中轴骨骼。

Metanephric adenoma is a very rare benign renal tumor with an embryonic architecture and primitive cytological appearance, superficially mimicking Wilms' tumor. This tumor sometimes reaches a considerable size (20cm) and still runs a benign clinical course.

后肾腺瘤是一个非常罕见的良性肾脏肿瘤，它表现出类似胚胎的结构并且具有原始的细胞外观，有时会形成一个大於20公分的大型肿瘤。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。