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Epigenetics investigates heritable changes in gene expression that occur without changes in DNA sequence.

表观遗传学研究在基因表达中的可遗传的改变，而在DNA序列上没有变化。

As the basement to integrate multi-scale spatiotemporal data, the object evolution model can retain the characteristic of the data with different temporal-scale or different spatial-scale, and reflect the temporal changes especially the heteromorphic changes, and the causalities within the evolving process.

本文通过对时空对象变化过程的分析，指出对象进化的结果不仅是特征的变化，还包括机制的变化，其直接动力是对象行为，其根本原因是其内在机制，时空事件起着对象间信息通道的作用，据此提出对象进化模型，该模型可作为多尺度时空数据集成的结构性基础，在反映时空现象的演变过程，特别是异构演变过程，以及在这个过程中产生的因果关系的同时，还可以保留时空数据的不同时间尺度和空间尺度特点，从而达到增加时空数据库的信息量的目的。

Previous findings from our laboratory have demonstrated that simulated weightlessness may result in atrophic changes with depressed vasoconstrictor responsiveness in hindquarter vessels, and hypertrophic changes with enhanced vasoconstrictor responsiveness in cerebral arteries of rats.

动物实验结果已证实，模拟失重可使大鼠不同部位动脉血管发生差异性改变：后身动脉血管发生萎缩性改变和收缩反应性降低；而脑部血管则发生肥厚性改变和收缩反应性增强。

We argue that the changes in meroplankton abundance, coincident with increased phytoplankton and declining holoplankton, reflect the synchronous effect of rising SST and related changes in the pelagic community on the reproduction and recruitment of many benthic marine invertebrates.

我们推断季节性浮游生物丰度的变化与浮游植物的增长和终生浮游生物的减少是保持一致的，是海水表面温度上升的反映，并与许多远洋底栖无脊椎动物的生殖生长相关。

Rat model of cryopreserved aortic and pulmonary valved homograft heterotopic transplantation was established to observe the changes of humoral and cellular immunological response and pathological changes of implanted homografts.

方 法 通过低温保存的大鼠同种异体带瓣主动脉和肺动脉异位移植的动物模型，观察同种移植后宿主体液和细胞免疫指标的变化，以及移植物的病理改变。

It is commonly believed that the mood changes in pregnancy are caused by hormonal changes.

人们普遍认为，情绪的变化和怀孕所造成荷尔蒙的变化。

In the toaster, it changes to heat; in a tiny wrist watch or a subway train or a 75,000 horse-power industrial motor, it changes to mechanical energy.

对烤面包机来说，电能转化成热能，在一个小小的手表里或者地铁列车里或者一台75000马力的工业电动机里，电能转化成机械能。

In the toaster,it changes to heat;in atiny wrist watch or asubway train or a75,000 horse-power industrial motor,it changes to mechanical energy.

对烤面包机来说，电能转化成热能，在一个小小的手表里或者地铁列车里或者一台75000马力的工业电动机里，电能转化成机械能。

Transmission electron microscope was used to observe the ultrastructure changes of the HPFs. The changes of the cell cycle and apoptosis of HPFs were evaluated with flow cytometry.

应用细胞培养技术、流式细胞术分析5F对HPF作用不同时间其细胞周期及诱导凋亡的特征，电镜观测HPFs超微结构改变。

Humans are more sensitive to changes in hue than changes in brightness.

人类更敏感的变化，色调比变化的亮度。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。