周期

Yet compared with the periods of some comets, that of the comet of 1882 is quite short.

然而与某些彗星的周期比较起来，一八八二年的彗星的周期是相当短的。

Objective To establish human oral squamous cell carcinoma cell line ,to ascertain its origin of tissue,and research curcumine's correlated toxicant effect toward squamous cell, to detect a series of bionomics after applying curcumine,such as cell morphous ,growth cycle,the expression of nuclear factor and cyclin .

研究目的旨在建立人类口腔鳞状细胞癌(oral squamous cell carcinoma，0SCC )细胞系，确定其组织来源，并研究姜黄素对鳞癌细胞的相关毒性作用，对作用后的细胞形态、生长周期、核转录因子蛋白及细胞周期蛋白的表达等进行一系列生物学特性检测。

This suggests that birth pulse, in effect, provides a natural period or cyclicity that makes the dynamical behavior more complex.

总之，生育脉冲在对系统动力学行为的影响上提供了一个自然的周期而使得系统能从倍周期分支通向混沌。

The role way of major QTL controlling Days-to-Tassel photoperiod sensitive indexes were partial dominances along with over dominance, and single QTL contribution of rate ranged from 5.53% to 15.52%.

控制抽雄光周期敏感指数的QTL有3个，单个QTL贡献率5.53%～15.52%，作用方式为部分显性和超显性；检测到控制散粉、吐丝光周期敏感指数QTL各1个，都位于第10染色体，作用方式为加性和部分显性。

Belonging to different ecotypes bred in recent years, a fast approach of identification of photoperiod sensitivity, in which flowering promotion rate was used as evaluation index, was developed.

以53个近年育成的不同生态类型大豆品种为试材进行人工控制光周期试验，建立了以开花促进率为光周期敏感性评价指标的快速鉴定方法。

In order to better study important role of CaM in cell cycle regulation is necessary to try to find CaM downstream effectors in a cycle of cells.

为了更好地研究CaM在细胞周期调控中的重要作用，就要试图找到CaM在周期细胞中的下游效应因子。

Elastase is an enzyme that shortens a cellular chemical, cyclin E, that is involved in controlling the cell cycle.

弹性蛋白酶是一种酶，缩短细胞化学，细胞周期蛋白E ，这是参与控制细胞周期。

Expression patterns of genes differentially expressed in starch metabolism and cell cycle during endosperm development7 DAP kernals, 15 DAP endosperms and 25 DAP endosperms of B73, ae/wx and sh1 were used to study the expression patterns of 18 differentially expressed genes in sugar metabolism and 9 differentially expressed genes in cell cycle. We found that the expression patterns of Pul, SBEⅡa, UGPase, SUS3, SSⅡa in sh1 and Sh2-1, SUS3, SSⅡa in ae/wx were altered, revealing that these genes may interact with each other.

碳水化合物代谢基因和细胞周期基因随胚乳发育的变化以B73、ae/wx、sh1授粉后7天种子、15天和25天胚乳为材料，分析18个糖代谢差异基因和9个细胞周期调节相关的差异基因的表达模式，研究发现sh1突变体中Pul、SBEⅡa、UGPase、SUS3和SSⅡa基因表达模式发生改变，ae/wx突变体中Sh2-1、SUS3和SSⅡa基因表达模式发生改变，揭示了突变体对这些基因的巨大影响，反映了它们可能存在相互作用。

Emphasis is placed on intrinsic f actors and natural environments like gender, size, molting cycle, feeding rate, circadian rhythm and season. Primary physicochemical changes such as temperature, pH, dissolved oxygen, salinity, and pollutants such as ammonia and copper sulfate are also addressed.

探讨的因子包括：落石出内因性因子－性别、大小、脱壳周期及摄食量，自然环境－日周期及季节，主要物理化学因子－水温、溶氧、pH及盐度，代谢产物如氨以及治疗剂如硫酸铜等。

This paper uses LCA system which is suitable to evaluate fibreboard products; it discusses on the basis of the LCA. It contains environment, economy and technology factors.

本文根据生命周期评价的技术框架，构建对我国现有的纤维板生产系统于环境效益、经济效益和技术性能等方面进行生命周期综合评价的模式。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失