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The generic distributions in both modern and fossil times were outlined, and their distribution center, place and time of origin and the way of dispersal were discussed. An attempt was made to discuss early differentiation, geographical radiation and morphological evolution of the family on the background of paleogeography and paleoclimatology, tracing back as far as the Late Cretaceous and Early Tertiary.

作者试图回到遥远的晚白垩纪和旱第三纪,从描绘桦木科植物起源和早期分化的古地理和古气候背景入手,分析了在这种背景下桦木科植物所发生的空间辐射以及植物体本身所产生的形态进化,以求得对桦木科植物起源、散布和分化作出比较合理的解释。

Results As the results, there was 6 patients with the ILVT cycle length of (286±38)ms. The indicaed site of EA by noncontact mapping was at the middle septum in 4 patients, and at the inferior septum in 2 patients. Mean time of EA was (48.6±32.8)ms before onset of the surface QRS. The length of conduction pathway was (2.6±0.9)cm. The ablation catheter mapping showed perfect match in at least 11 of 12 leads at the EX (≥11/12), but not at the EA (≤10/12) with pace mapping during sinus rhythm. Purkinje potentials were mapped at EA and CP in all cases, but only one case at EX, and diastolic potentials were mapped at EA in 2 cases during ILVT. All cases were successfully ablated by area ablation at EA or/and line ablation at CP during sinus rhythm. None suffered a recurrence during (12±6) months follow-up.

6例ILVT周长为(286±38)ms,非接触标测显示4例激动起源位于中间隔,2例位于下间隔,EA较体表QRS波提前约(48.6±32.8)ms,传导径路长约(2.6±0.9)ms.6例病人在窦性心律下消融导管起搏标测12导联QRS形态与ILVT相匹配(≥11/12)处位于EX,而非EA(≤10/12)见正文。6例病人在室性心动过速期间消融导管于EA和CP处标测到PP,2例于EA标测到DP,1例于EX标测到PP.6例病人在窦性心律下于ILVT起源部位行片状或/和传导径路作线性消融均获成功,随访(12±6)月,未见复发。

Mean time of EA was (48.6±32.8)ms before onset of the surface QRS. The length of conduction pathway was (2.6±0.9)cm. The ablation catheter mapping showed perfect match in at least 11 of 12 leads at the EX (≥11/12), but not at the EA (≤10/12) with pace mapping during sinus rhythm. Purkinje potentials were mapped at EA and CP in all cases, but only one case at EX, and diastolic potentials were mapped at EA in 2 cases during ILVT. All cases were successfully ablated by area ablation at EA or/and line ablation at CP during sinus rhythm. None suffered a recurrence during (12±6) months follow-up.

6例ILVT周长为(286±38)ms,非接触标测显示4例激动起源位于中间隔,2例位于下间隔,EA较体表QRS波提前约(48.6±32.8)ms,传导径路长约(2.6±0.9)ms.6例病人在窦性心律下消融导管起搏标测12导联QRS形态与ILVT相匹配(≥11/12)处位于EX,而非EA(≤10/12)见正文。6例病人在室性心动过速期间消融导管于EA和CP处标测到PP, 2例于EA标测到DP, 1例于EX标测到PP.6例病人在窦性心律下于ILVT起源部位行片状或/和传导径路作线性消融均获成功,随访(12±6)月,未见复发。

Adjusting between welfare and punishment, tend towards middle of the road is the rule of juvenile justice policy development. Welfare is a kind of periphrastic juvenile control policy, the pretext to constructing juvenile justice system, and the groundwork that cannot been threw away during the development of juvenile justice.

本文通过对美国少年司法起源与变迁史的考察发现,无论是多么伪善或者直白,少年司法起源与变迁背后的推动力均主要源自成人社会控制少年的需要;而少年司法政策的演变规律则呈现出在福利与惩罚之间调整其立场,在总体上走向折中主义的趋势;作为一种"隐蔽而迂回"的少年控制策略,福利是建构少年司法的旗帜,也是少年司法变迁中难以背弃的根基。19世纪以前的美国,大体处于"前少年司法时代"。

Begin at naissanee of universe, the source of hardware materials and distribution process in the earth are pointed out; Begin at naissance of life-form, of ancient ape and of pithecanthropus, the history that tools were used and the source of hardware articles made from metal are researched.

本文从宇宙诞生开始探讨了五金材质的起源和在地球上的布局过程;从地球上诞生生物及产生古猿、猿人开始探索了人类使用工具的历史和五金产品的起源

According to the Hong Kong paper 蘋 fruit daily report, the construction cost 3,500,000,000 origin (approximately 55,000,000,000 Yen) the nest of the bird which is thrown,unless every year 50,000,000 origin (approximately 800,000,000 Yen) cost of maintenance above is applied, is danger which the scrap iron is converted instantaneously.

根据香港纸蘋果子每日报告,建筑费3,500,000,000起源(大约55,000,000,000日元)被投掷鸟的巢,除非每年上面50,000,000个起源(大约800,000,000日元)的维修费用是应用的,是瞬间地转换废铁的危险。

Try to find as many places as possible with Old English origins (ending in -tun,-burh,-feld, for example), and with Scandinavian origins (-by,-thorpe,-toft,-thwaite) to work out where the Viking settlers chose to make their homes, how close they were to their English neighbours, and the kinds of activities in which they might have engaged.

试图找到许多地方尽可能与古英语起源(截至屯,- burh ,菲尔德,例如),与斯堪的纳维亚起源(按,-索普- toft ,- thwaite )制定的维京定居者选择,使他们的家园,他们是如何接近他们的英语邻居,和各种活动中,他们有可能参与。

Praxis apparently played host to the largest of these, and Lang, to name one, has speculated that the Pits not only gave rise to extinct creatures, but succeeded in regressing the entire planet to a formative stage of destructive vulcanism.

普拉西斯上的起源坑,显然是它们中最大的一个。朗等人推测起源坑不仅仅能复活已灭绝的生物,而且能使整个行星回退到火山活动频繁的成型时期。

Here is found the non-metaphorical origin of the idea of truth as a conceptual grasp of things or adequation of thought and Being.

在这里就发现了真理的非隐喻性起源的观念作为对事物的概念性的领会或是思想与存在的等效物(非形而上学起源观念的真理作为事物的概念性领会或是思想与存在的适当的等价物)。

The medium of 1/2MS+ 0.4mg/L NAA +0,2mg/L IBA was used for rooting, and the rooting rate was 75%. The origin and development of somatic embryos was observed by histological method. It was found that the somatic embryos of Aesculus hippocastanum L were developed from single cell.

通过组织细胞学方法研究体细胞胚的起源与发生部位,发现欧洲七叶树体细胞胚为单细胞起源,外植体的表面及内部都可以发生体细胞胚。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力