But how does adding 'back' to 'track' change its meaning?

但是，在“track”后面加上“back”会如何改变它的含义呢？

They can also track changes in the climate by measuring the clouds.

他们还可以通过测量云层来追踪气候的变化。

The sharp jump in temperatures has unsettled even those scientists who have been tracking climate change.

气温的急剧上升甚至让那些一直在跟踪气候变化的科学家也感到不安。

We also need to track changes in the abundances and identities of the species present in these ecosystems.

我们还要追踪这些生态系统中物种密度和特性的变化。

The thermometer tracks the temperature change, which is part of the calculation we have to do.

温度计跟踪温度变化，这是我们要做的计算的一部分。

By measuring the magnetic fields caused by electric currents in the brain, this technique allows us to track changes in brain activity at the scale of milliseconds.

通过测量大脑中电流引起的磁场，这项技术使我们能够以毫秒为单位跟踪大脑活动的变化。

Such variations, says Dr Tucker, are one reason why the ABP, which tracks changes in an athlete's physiology over time, is difficult to apply to steroid doping.

塔克博士说，由于ABP追踪的是运动员的生理随时间的变化，所以这种自然差异是ABP难以应用于类固醇兴奋剂的原因之一。

Central bankers in emerging economies lack the granular data at the disposal of those in advanced economies to track these changes.

新兴经济体的央行行长缺乏发达经济体央行行长可以使用的精细数据来追踪这些变化。

And, sure enough, when we developed the fMRI machine in the 1990s, to track moment-to-moment changes in brain activity, the old localized map of brain activity quickly began to unravel.

于是，当 90 年代我们发明功能磁共振成像机器并用来追踪脑部即时变化时，从前的局部脑活动图果然迅速地开始瓦解。

This takes a ton of time and effort from the side of the artist, and we haven't even talked about tracking the changes between frames as we're talking about video animations.

这需要花费艺术家大量的时间和精力，并且我们甚至还没有谈论到跟踪帧之间的变化，因为我们正在谈论视频动画。

In September, vax appeared more than 72 times more frequently than the year before, said Oxford Languages, which analyzes news content to track changes in the English language.

9 月份，vax 出现的频率比前一年高出 72 倍以上， Oxford Languages 表示，该公司分析新闻内容以跟踪英语语言的变化。

To tease apart who's saying what, researchers devised an algorithm based on the Parsons code, the software that mammals, I mean that fishes songs from music databases, by tracking changes in pitch over time.

为了识别谁在说什么，研究人员基于帕森斯代码发明了一种算法，通过追踪一段时间的音高变化，这款软件可以从音乐库中识别哺乳动物，我指的是鱼类的声音。

Now you might be inclined to just let a Sim be free for a while and see how they behave and then pop them into isolation later, and track the changes.

现在你可能倾向于让模拟市民自由一段时间，看看他们的行为如何，然后稍后将他们隔离，并跟踪变化。

Oliver says the unsupervised machine learning method could be retooled to use sounds to measure the movements of other wildlife" . This could allow us to track large-scale changes in how animals are responding to climate change, " she said.

奥利弗说，这种无人监督的机器学习方法可以重新调整，即用声音来测量其他野生动物的运动。她说：" 这可以让我们追踪动物在应对气候变化方式中发生的大规模变化。"

Examining MRI scans of Arabic speakers living in their home countries or tracking brain changes as people learn new languages would help separate the effects of language learning from those of native language, Qi says.

齐说，检查居住在本国的阿拉伯语使用者的核磁共振扫描，或跟踪人们学习新语言时的大脑变化，将有助于区分语言学习和母语学习的影响。

First, credible forest transactions require accurate and precise measurement, and thanks to advances in satellite data and remote sensing, we can measure the amount of carbon a forest contains and track changes in real time.

首先， 可靠的森林交易需要准确和精确的测量，并且由于卫星数据和遥感技术的进步，我们可以测量森林中的碳含量并实时跟踪变化。