其中的教训是,无法应对结构性突变的预测方法,会几乎无限次地失效。
The lesson is that a forecasting technique that cannot deal with structural breaks is a forecasting technique that can misfire almost indefinitely.
但这些变化并不像成功的基因突变一样,能够永久地遗传下去,实际上它们往往在一两代的时间里就会消失。
But those changes are not passed on indefinitely, like a successful genetic mutation would be. Instead, they are wiped out over a generation or two.
傅的团队想要更可控地研究这种基因突变的效果,所以他们改造出一种拥有同种基因变化的老鼠。
Fu's group wanted to study the effect of the mutation in a more controlled way, so they created a strain of mice with the same genetic change.
他说,并不是几处基因突变就能导致细胞不受控制地疯长,癌细胞是因整套染色体组的瓦解之后形成的。
Rather than springing from a few genetic mutations that spur cells to grow at an uncontrolled pace, cancerous tumors grow from a disruption of entire chromosomes, he says.
事实表明,我们也许会本能地爱上一个其DNA在某些方面突变成了与我们自己的DNA相似的人。
It turns out we may even be hard-wired to fall in love with people sporting DNA that is similar to our own in some ways.
不过随著基因工程的排序越来越价格便宜和司空见惯,大家实在应该更迅速地掌握任何危险的病毒突变。
But as genetic sequencing becomes cheap and routine, it ought to be possible to pick dangerous mutations up quickly.
桑顿和他的同事们通过引入7个“提前”突变,成功地使最古老的受体AncGR1进化成为一种应激激素特定受体。
Thornton and his colleagues successfully made the oldest ancestor, AncGR1, evolve into a cortisol-specific receptor by introducing seven "forward" mutations.
但这些变化并不能够像成功的基因突变一样永久地传下去。
But those changes are not passed on indefinitely, like a successful genetic mutation would be.
有害的基因突变较少可能出现于大群体中,因为广阔的基因突变种类,他们可以随意地选择同伴进行繁衍。
Harmful genetic mutations are less likely to appear in large populations where individuals reproduce with random partners due to the wider variety of genetic mutations.
二代拉米夫定的长期应用可以有效地抑制病毒多聚酶突变频繁的HBV发生复制。
Long-term treatment with the second-generation nucleoside analogue lamivudine (lam) efficiently inhibits HBV replication with frequent viral polymerase mutations.
文中建立的正弦形扁拱跳跃屈曲突变模型可以清晰地阐明扁拱失稳的物理意义。
In this paper, a catastrophe model of sine flat arch jumping bend is established.
在饲养之后几乎像二个突变异种一样的狼吞虎咽地,肯恩已经淋浴而且现在在床上放置。
After feeding almost as ravenously as the two mutants, Ken had showered and now lay on the bed.
它们只是运用一种独特地方式简单地改变行为来完成这一工作的。这就提示了行为有助于那些看似有害的突变的流行。
They accomplish this by simply altering their behavior in an ingenious manner, suggesting that behavior can help what may seem like a harmful mutation spread.
大多数动植物对温度的巨变或突变比较敏感,因此海洋是一个安全且舒适的栖息地。
Most animals and plants are sensitive to large or sudden changes in temperature, so the ocean is a safe and comfortable habitat.
同样地,热带植物发生的突变比温带植物多。
烟草能显著地提高伤寒沙门氏菌突变率和CHO细胞集落形成率;
Tobacco increased significantly the mutation rate of Salmonella typhia and the formation rate of CHO colony.
目的:检测地红霉素的致突变活性。
本文详尽地讨论了砷化镓超突变结变容二极管的设计原理和方法。
In this paper, the design principles and methods of the super-abrupt junction GaAs varactor diode has been discussed.
大量定点突变实验、选择性化学修饰实验、抗多肽抗体结合实验等能很好地确证该联配结果的正确性。
The reliability of the method was confirmed by site-directed mutagenesis, selective chemical modification, site-specific antipeptide antibody binding experiments, and so on.
并对相位突变和频率突变的情况进行了仿真研究,说明在相位和频率发生变动时三相锁相环仍能有效地锁定相位,能够满足系统变频的要求。
The simulation results prove that the three-phase phase-locked loop can work well in disturbance situation and variable frequency system when the frequency of the inputs is variable.
经典的ABC模型有效地解释了花器官发育的分子机制,可以广泛地解释因同源异型基因的突变而引起的植物花器官变异。
The classical ABC model illustrated the molecular mechanism of floral development, and explained the floral organ mutants of homeotic gene.
实验表明,该检测方法能快速有效地检测出舵机的小幅值突变和缓变故障。
Experiments demonstrate that the proposed detection methodology can be applied to on-line detect robustly and rapidly the abrupt and drift type faults of the servo.
基于对真实网络流量数据的观察,在突发异常的定义中引入持续性因子及突变性因子,以更好地描述其在真实应用环境中的特征。
Based on the observation of real network traffic data, we introduce the lasting factor and abrupt factor in the definition of burst in order to better characterize the burst in the real application.
紧密连接蛋白克劳丁-1单克隆抗体能够有效地抑制大多数基因型丙型肝炎病毒感染和自患者分离的高度突变的丙型肝炎病毒准种感染。
The monoclonal antibodies against CLDN1 efficiently inhibited infection by HCV of all major genotypes as well as highly variable HCV quasispecies isolated from individual patients.
熟知brca1和BRCA2基因突变可引起乳癌和卵巢癌,不过在普通人群中突变的频率还没有很好地描述。
Mutations in the BRCA1 and BRCA2 genes are known to lead to breast and ovarian cancer. However, the frequency of these mutations in the general population has not been well-characterized.
熟知brca1和BRCA2基因突变可引起乳癌和卵巢癌,不过在普通人群中突变的频率还没有很好地描述。
Mutations in the BRCA1 and BRCA2 genes are known to lead to breast and ovarian cancer. However, the frequency of these mutations in the general population has not been well-characterized.
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