The chemical composition of rainfall changes slightly as raid clouds move.
当雨云移动时，降雨的化学成分略有变化。
The chemical composition of rainfall changes slightly as rain clouds move.
降雨的化学成分随着雨云的移动而发生轻微变化。
Scientists had information about the shape of the domes but not about their chemical composition and origins.
科学家们掌握了关于圆顶形状的信息，但不清楚它们的化学成分和起源相关的信息。
Samples recovered from the expedition revealed important differences in chemical composition and fossil distribution among the sediment layers.
探险队采集的样品揭示了沉积物层之间化学成分及化石分布上的重大差异。
Ir is found in high concentrations in some meteorites, in which the solar system's original chemical composition is preserved.
人们发现，在一些保存着太阳系原始化学成分的陨石中，铱元素的含量很高。
We know they smear a liquid on the tube, but we don't know where they secrete it from or what its chemical composition is.
我们知道它们在管上涂抹了一种液体，但我们不知道它们从哪里分泌出这种液体，也不知道它的化学成分是什么。
When you analyze this light, you can figure out their distance from the Earth, and identify what they are made of, determine their chemical composition.
当你分析这些光的时候，你可以计算出它们与地球的距离，并确定它们由什么构成，查明它们的化学成分。
The answer to this riddle lies in the metabolic activity of early photosynthetic life-forms that slowly but surely transformed the chemical composition of Earth's atmosphere.
这个谜题的答案在于早期光合生命形式的新陈代谢活动，这种活动缓慢但一定改变了地球大气的化学成分。
Each pattern stands for a distinct chemical element, and so different sets or patterns of spectral lines mean that the star has a different chemical composition.
每一种样式代表一种不同的化学元素，所以光谱线的不同集合或模式意味着这颗恒星有不同的化学成分。
Chemical analysis of invertebrate prey reveals remarkable variation in nutrient composition among species; even within species, nutrient composition may vary considerably.
对无脊椎动物猎物的化学分析显示，不同物种之间的营养成分存在显著差异；即使在种内，营养成分也可能有很大的差异。
If a change does not affect the food's chemical composition, we call it a physical change.
如果一种变化不影响食物的化学成分，那我们便称之为物理变化。
The Saussurea involucrata chemical composition was: alkaloid, flavanone, sterol, volatile oil, 16 kind of amino acids, Saussurea involucrata lactone and so on.
雪莲化学成分为：生物碱、黄酮、甾醇、挥发油、16种氨基酸、雪莲内酯等。
Because volcanoes are gas-driven machines. An eruption is often preceded by an increase in discharged gas and by variations in its chemical composition.
因为火山就相当于一台气体驱动的机器，排放气体量的增加和气体化学成分的改变通常是喷发的前奏。
The 'gold' pits isn't likely to be ferried back to Earth, though - scientists remain unsure of the chemical composition of the yelllow, shimmering dust that lines the pit walls every 'summer'.
可是那些在凹点的金线不太可能被带回地球，所以科学家还不能确定这在每个“夏天”都在凹点排成线而且发光的黄色灰尘的化学成分。
Rather than analyse microscopic cracks in tooth enamel or the chemical composition of bone, as others had done, Strait's team took an approach more common to mechanical engineering.
斯特雷特研究小组采取了一个比机械工程更常见的做法，而不是像别人所做的一样，分析牙齿珐琅质里面的显微裂缝或骨头的化学成分。
Estimates have been made based on the expected chemical composition of the interior, but we've never actually measured the radiogenic contribution.
估算建立在预期的内部化学成分上，但我们从来没有实际地测量放射性物质在热量产生中发挥的作用。
Because it is analyzing the chemical composition of the wine or food placed before it, it can also alert its owner to possible health issues, gently warning against fatty or salty products.
由于能够分析酒品和食物的化学成分，它还能提示主人注意健康问题，温和地提醒主人避免食用多脂或者过咸的产品。
The results actually compared pretty well to the earlier estimate based on chemical composition.
这个结果相比早先根据化学成分计算出来的确实相当不错。
Researchers suspect there may be something unique about the chemical composition of black tea polysaccharides that boosts their blood sugar benefits.
研究者猜想在红茶多糖化学成分有某些独特的东西，能增强它的血糖功效。
The next step is to look at the chemical composition of these planets, their cloud structures and their thermal properties.
下一步是要了解这些行星化学成分，它们的云层结构和热性能。
The random structures formed by packed bubbles, as seen in figure 1, are largely independent of bubble size and chemical composition.
图1中所示的塞满了的气泡形成的随机性结构很大程度上与气泡大小和化学成分是不相关的。
In those brief moments, the light from the star would flow through the planet's atmosphere, allowing astronomers to study the wavelengths produced and infer the atmosphere's chemical composition.
在这一刹那，恒星发出的光会穿透行星的大气，天文学家得以研究产生的波长，并推断行星大气的化学成分。
Geologists are investigating the chemical composition of carbonate rocks that lie beneath the surfaces where early human fossils have been uncovered.
地质学家正在调查位于早期人类化石发现地之下的碳酸盐岩的化学组成。
Evidence could include changes in the chemical composition of the asteroid, the size distribution of debris surrounding it, or other thermal changes that could be detected from Earth.
证据包括从地球可探测到的小行星的化学组成、周围碎屑颗粒分布、或者温度方面的改变。
The researchers say that accurately determining the chemical composition of objects requires exposing it to different and continuous ranges of terahertz frequencies.
科学家们称，要全面鉴别出某种物体的化学成分，需要使用频率连续变化的太赫兹频率级激光对物体进行照射。
There have been 73 missions, manned and unmanned, to the Moon, and understanding its chemical composition, particularly finding water, has always been a priority.
迄今为止，围绕月球，共开展了73项科学探测任务，载人或者无人，以了解月球的化学成分，尤其是发现水，更是重点关注的项目。
Ascertaining that a star has exactly the sun's age is impossible, he says, and many unrelated stars share its chemical composition.
他继续补充道，找到一个和太阳有相同年龄的恒星根本没有可能，而且很多和太阳没有关系的恒星也有着与其相同的化学构成。
Ascertaining that a star has exactly the sun's age is impossible, he says, and many unrelated stars share its chemical composition.
他继续补充道，找到一个和太阳有相同年龄的恒星根本没有可能，而且很多和太阳没有关系的恒星也有着与其相同的化学构成。
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