查询词典 stem from

A new method for establishing Richards polymorphic site index model was developed. And the Cunninghamia Lanceolata was taken as an example. Data from stem analysis of 164 trees was used.

中文摘要：本文以杉木为例，探讨了基于导向曲线的Richards多形地位指数模型的研建新方法——参数置换法。

Any of numerous usually tropical ferns having a woody trunklike stem or caudex and crown of large fronds; especially Australia and New Zealand; chiefly of the families Cyatheaceae and Marattiaceae but some from Polypodiaceae.

茎或大复叶的花冠如树干的一种热带蕨类；尤其常见于澳洲和新西兰；主要属于桫椤科和观音座莲舅科，也有部分属于水龙骨科。

objectivethe differences of the catechin, ursolic, polysaccharide, and tannide from the different segments of the succulent stem of cynomorium songaricum rupr.

目的分析锁阳肉质茎不同部位儿茶素、熊果酸、多糖和鞣质含量的差异，以期为锁阳合理用药及人工优质栽培提供理论依据。

In this study, four different methods were used for genomic DNA extraction from air-dried Dendrobium candidum stem respectively.

本文以铁皮石斛干茎为材料，采用了四种方法从干品石斛中提取基因组DNA。

Stem branched from base; valves triangular, margin dentate or denticulate.

茎分枝自基部；三角形的裂爿，边缘具牙齿或具小齿。

Robert Dingwall of the University of Nottingham argues that the apparently large number of reported cases in Britain may stem in part from a very good system of surveillance.

诺丁汉大学的 Robert Dingwall 认为，英国报道出大量的受感染人数也许部分原因是由于该国检测体系的发达和完善。

Robert Dingwall of the University of Nottingham argues that the apparently large number of reported cases in Britain may stem in part from a very good system of surveillance.

诺丁汉大学的Robert Dingwall认为，在英国所报道的病例数量非常大，还有一个原因就是英国有一个非常好的监管系统。

The dult stem cells abilities of differentiation, self-renewing and self-maintenance tended to be limited so that it, which is characterized of short life time, could differentiate by means of mono-direction or double direction. What is the most important is that it can not differentiate all cells from the three embryonic layer.

成体干细胞具有一定的生长期，其分化能力、自我更新、自我维持能力具有局限性，生存时间相对较短，仅能单向或双向分化，其重要特点之一是它不能分化成机体所有的三个胚层来源的细胞。

In this paper, the histogical studies of Elaeagnus mollis stem segments cultured on MS with higher BA and lower NAA from 0 to 30 days were researched.

本文对翅果油树大宫灯型茎段培养在MS附加6－BA较高、NAA较低浓度的培养基上培养0～30d的组织学变化进行了研究。

Placenta as a key temporary organ for maintaining oxygen and nutritive substance exchange in universe and foetus contained immature embryon and adult stem cells that trended to maturity no matter from anatomic structure or growth, besides, placenta could not be related to ethics.

胎盘作为胚胎发育中维系母体和胎儿氧气及营养物质交换的重要暂时性器官，无论从解剖结构还是在发育行为上，都包含了较为幼稚的胚胎及趋于成熟的成体干细胞成分，而且胎盘不会涉及伦理道德问题，目前已成为寻找人类间充质干细胞新来源及提高临床应用效果的研究热点。

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％。