观测工作是借助于各种望远镜来进行的。
The observational work is carried out on a range of telescopes.
我们所做的每个观测包含了能量的交换。
科学家们可以从那里对外太空进行更清晰的观测。
Scientists can make clearer observations of deep space from there.
古代农业文明观察星星并用来观测记录季节变化。
Ancient agricultural civilizations observed the stars and then used those observations to keep track of the seasons.
事实上，观测表明，在木卫二冰层之下存在液态水。
Indeed, observations suggest liquid water exists beneath Europa's icy crust.
科学观测和计算的准确性，总是受制于科学家的计时方法。
The accuracy of scientific observations and calculations is always at the mercy of the scientist's timekeeping methods.
但是天文学家辛苦分析这些观测金星凌日的探险活动的结果。
But astronomers laboured hard to analyse the results of these expeditions to observe Venus transits.
它大体的准确性可以通过日出日落等很容易观测的现象来证明。
Its general accuracy could be checked against easily observed phenomena, like the rising and setting of the sun.
观测表明M87星系的气体云围绕星系中心旋转的速度异常快。
Observations indicate that gas clouds in galaxy M87 are whirling unusually fast about the galaxy's center.
由于大型卫星产生的强烈反射，它们对望远镜观测的干扰更为严重。
The large satellites interfere more seriously with telescope observations because of the strong reflections they produce.
他解释说：“随着新的观测数据的收集，它们必须被整合到网络中。”
"As new observations are collected," he explains, "they must be integrated into the web."
经过长达六年的观测，发现有五颗行星的质量是地球的13-25倍。
Six years of observations revealed the presence of five planets between 13 and 25 times the mass of Earth.
当第一次用望远镜观测到火星时，人们从飞机上看到，火星的圆盘在地球上纵横交错。
When the planet Mars was first observed through a telescope, people saw that the round disk of the planet was crisscrossed on earth that are viewed from an airplane.
尽管海平面被观测到相对斯堪的纳维亚海岸每年下降4毫米，这一假设并没有受到破坏。
The hypothesis is not undermined by observations that sea levels are falling relative to the Scandinavian coast by four millimeters a year.
当第一次用望远镜观测到火星时，人们从飞机上看到，火星的圆形圆盘在地球上纵横交错。
When the planet Mars was first observed through a telescope, people saw that the round disk of the planet was criss-crossed on earth that are viewed from an airplane.
重建过去的气候变化是极其困难的，因为在欧洲和北美，几个世纪前才开始系统的天气观测。
Reconstructing the climate changes of the past is extremely difficult, because systematic weather observations began only a few centuries ago, in Europe and North America.
区域模型成功地模拟了该区域当今云场的关键特性，包括观测到的云区对厄尔尼诺现象的反应。
The regional model successfully simulates key features of the region's present-day cloud fields, including the observed response of clouds to El Nino.
1677年11月，哈雷在南太平洋荒凉的圣赫勒拿岛上观测到了水星（最靠近太阳的行星）的凌日现象。
In November 1677, Halley observed a transit of the innermost planet, Mercury, from the desolate island of St Helena in the South Pacific.
鲍恩说，早期的探险者已经观测过这条路的一小段，但他们没有意识到它的重要性，也没有继续进行观测。
Short segments of the road had been observed by earlier explorers, Bown said, but they failed to realize its significance or follow up on their observations.
不论如何，沃尔夫查阅了欧洲各个天文台的所有记录，并把大约100年前的太阳黑子观测历史整理在一起。
Anyway, Wolf went though all records from various observatories in Europe and put together a history of sunspot observations going back about 100 years.
此外，他们说，这是研究人员收集各种观测资料的最佳方式，而这些资料是加快发现或确定大规模趋势所必需的。
Furthermore, they say, it is the best way for researchers to gather the range of observations that are necessary to speed up discoveries or to identify large-scale trends.
长期以来，这种密度上的相似性促使人们猜测月球是从快速旋转的地球上分裂出来的，但这种想法创始于两次观测。
This similarity in density has long prompted speculation that the Moon split away from a rapidly rotating Earth, but this idea founders on two observations.
在这些实验和实地观测的基础上，人们制定了所谓的竞争排斥定律，根据该定律，没有两个物种可以占据相同的生态龛。
On the basis of these experiments and of field observations, the so-called law of competitive exclusion was formulated, according to which no two species can occupy the same niche.
如果脑电图装置能被发现与研究者观测的的大脑活动改变相符合，那么一个帽子能预警即将发生的错误可能会成为现实。
If the EEG device can be found to be consistent with changes in brain activity observed by researchers, then a hat to warn of impending errors may become a reality.
过去几年的卫星观测和潜艇调查显示，极地地区的冰层减少了，但最近的测量显示，冰层的减少量比之前设想的更为明显。
Satellite observations and submarine surveys over the past few years had shown less ice in the polar region, but the recent measurements show the loss is more pronounced than previously thought.
这些变化在现代观测短时间范围内几乎是看不见的，而且，有人认为，这些变化常常被不完善的化石记录中的无数空白所掩盖。
Such changes are all but invisible over the short time scale of modern observations, and, it is argued, they are usually obscured by innumerable gaps in the imperfect fossil record.
勒让蒂乘坐一艘法国军舰横穿印度洋逃亡时看到了一次壮观的凌日现象，但船剧烈摇晃，使任何准确观测的尝试都以失败告终。
Fleeing on a French warship crossing the Indian Ocean, Le Gentil saw a wonderful transit, but the ship's pitching and rolling ruled out any attempt at making accurate observations.
他们实际上在观测鱼向上游的迁移活动。
They actually monitor the movement of the fish going up river.
火星太暗，在空中位置太低，所以观测不到。
望远镜需要放置在最佳的观测点。
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