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The PROTOPHLOEM and METAPHLOEM are primary tissues and derived from the procambium,while the secondary phloem is formed from the VASCULAR CAMBIUM.

原生韧皮部和后生韧皮部属于初生组织，来源于原形成层，而次生韧皮部由维管形成层产生。

A resin derived from methacrylic acid .an enzymatic process in cell metabolism that synthesizes ATP from ADP.

在细胞的新陈代谢中一种由二磷酸腺苷合成三磷酸腺苷的酶促过程。

Mill was a complete empiricist about mathematics and held both that mathematical concepts are derived from experience and also that mathematical truths like 2+2=4 are really inductive generalisations from experience.

厂是一个完整的经验主义对数学都举行的数学概念，从经验中得出的经验，还从数学真理像2 +2 = 4是真正箹奚概括。

In fact,it originated from Minos civilization in Crete,however,it is not the primary one,but a secondary one,which derived from the Egyptian farming culture and west Asian commercial civilization.

其实，真正的源头应是克里特岛上的米诺斯文明。但它并非原生文明，而是在埃及农业文明与西亚商业文明的影响下发展起来的次生文明。

Most of the S. aureus strains from pneumonia and bronchitis are derived from the nasal cavity.

大部分的金黄色葡萄球菌株肺炎和支气管炎是来自鼻腔。

Minimalism,it derived from the nonobjective painting sculpture,which springs from an art genre in 1950s America.

而简约风格，源于上世纪60年代当代美国一个艺术流派兴起的一种非写实绘画雕塑。

The results showed that the number of chromosome, which was from the cultured seedlings of meristem tip and the rank seedlings of meristem tip, was not altered, both the number were 2n=16,the hereditary stability of callus and regeneration plant was poor; and the variation percentage of chromosome in callus was 43.4%, among which haploid accounted for 6.7%, triploid accounted for 2.5%,tetraploid accounted for 10%,pentaploid accounted for 4.2%,hexaploid accounted for 3.3%,septuploid accounted for 4.2%,octoploid accounted for 3.3%,dysploid accounted for 9.2%;the chromosome variation percentage of differentiation seedlings derived from callus was11.7%,among which haploid was 6.7%,triploid accounted for 1.7%,tetraploid was 3.3%.

结果表明，茎尖分生组织培养的幼苗及丛生苗遗传稳定，其染色体未发生倍性变异，均为2n=16；愈伤组织及其再生苗遗传稳定性较差，愈伤组织染色体数变异率为43.4%，其中单倍体占6.7%、三倍体占2.5%、四倍体占10%、五倍体占4.2%、六倍体占3.3%、七倍体占4.2%、八倍体占3.3%、非整倍体占9.2%；愈伤组织分化苗染色体变异率为11.7%，其中单倍体占6.7%，三倍体占1.7%，四倍体占3.3%。

Historical research has been carried out to rediscover lost metals of the highest standard and finest finish, from 958 Britannia silver to paktong, a re-discovered metal derived from an 18th-century Chinese candlestick, to Tula steel not used in furniture since the reign of Catherine the Great.

历史的研究已经进行了重新找回失去金属的最高标准，最好的成绩，来自958不列颠白银paktong ，重新发现的金属源于18世纪的中国烛台，以图拉钢没有用的家具，因为统治叶卡捷琳娜大帝。

The result of the research on children's learning profile was found that the observation record that derived from teaching process and interview analysis that got from two text-based tests. The students who are high and intermediate achievers can make first-order and second-order conditions on four-type regular problems by means of discussion and presentation in class. In addition, they can solve problems utilizing "perceptibility" when doing two text-based tests.

研究结果显示，藉由教学过程的观察记录及两次施测后的访谈分析所获得的学童学习历程观之：高成就及中成就组学童藉由讨论与发表，在四种型态问题皆能展现出察觉规律的一阶至二阶层次能力，并能在两次施测时运用察觉能力成功解题。

It is now a standard procedure, and examples are published regularly. April 2009 sees the publication of a tree covering all the animal phyla, derived from sequences from 150 genes in 77 taxa.

这种技术现在已经是一个标准程序，并经常有例子公开发表。2009年4月发表的一棵涵盖所有动物门的生命树，检测了77个类群的150个基因的序列。

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。