我们实际上改变了地球大气层的化学成分。
We have literally altered the chemistry of our planet's atmosphere.
那名患者的血液化学成分受到了定时的监测。
许多食物因所含的化学成分和添加剂被怀疑有害健康。
Many foods are suspected of being detrimental to health because of the chemicals and additives they contain.
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 raid clouds move.
降雨的化学成分随着雨云的移动而发生轻微变化。
The chemical composition of rainfall changes slightly as rain clouds move.
她说目前确认化学成分是否造成癌症的途径每次对其进行试验。
She says the current way to identify whether chemicals cause cancer is to test them one at a time.
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。
Samples recovered from the expedition revealed important differences in chemical composition and fossil distribution among the sediment layers.
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。
Ir is found in high concentrations in some meteorites, in which the solar system's original chemical composition is preserved.
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。
Scientists had information about the shape of the domes but not about their chemical composition and origins.
所有这些不同的成分聚集形成像阿连德一样的球粒陨石，具有很类似于太阳的化学成分。
All these diverse constituents are aggregated together to form chondritic meteorites, like Allende, that have chemical compositions much like that of the Sun.
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。
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.
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。
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.
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。
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.
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。
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.
研究者们还需要判断嗅觉到底是一种还是两种感觉，一种感觉回应气味本身，另一种感觉记录空气中无味的化学成分。
Researchers have still to decide whether smell is one sense or two—one responding to odours properly and the other registering odourless chemicals in the air.
肥皂中的化学成分对我们有什么帮助？
每一种原料都有自己的化学成分和味道。
Those ingredients each have their own chemicals and their own flavors.
海洋科学家研究海洋的化学成分、气候模式、海底地貌以及许多其他领域。
Ocean scientists study the chemical make-up of the ocean, weather patterns, the geography of the ocean floor, and many other areas.
哪怕像牙膏这种简单的东西也至少有三种化学成分来保持牙齿清洁。
Something as simple as toothpaste has at least three chemicals that keep your teeth clean.
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。
If a change does not affect the food's chemical composition, we call it a physical change.
甲虫幼虫含有独特的化学成分，从猎食它们的鸟类的羽毛和血液中可以找到这种成分的痕迹。
The beetle larvae have a distinct chemical make-up, which can be traced through the feathers and blood of birds that eat them.
目的是研究芍药根皮的化学成分。
The objective was to study the chemical constituents in the root bark of Paeonia suffruticosa Andr.
葫芦茶中主要含黄酮类、酚类及三萜类等化学成分。
Flavonoids, Phenols and triterpenes are the main constituent exist in Desmodium triquetrum(L. )DC.
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。
The Saussurea involucrata chemical composition was: alkaloid, flavanone, sterol, volatile oil, 16 kind of amino acids, Saussurea involucrata lactone and so on.
研究了三球悬铃木树皮中的酚类化学成分。
Study on the EtOAc from the barks of Platanus orientalis Linn.
用四极质量分析仪对碳化硅颗粒表面吸收的气体进行了分析，获得了碳化硅颗粒的表面化学成分。
The gases absorbed on the surface of SiC particles are analyzed with the quadripole mass analyzer.
石油里的一些化学成分具有高腐蚀性。
复合胺是一种大脑中与人类感情有关的化学成分。
这将改变电池的化学成分、机械特性以及控制电路。
These involve changes to the lithium chemistry of batteries, their mechanical properties and the electronics that control them.
这将改变电池的化学成分、机械特性以及控制电路。
These involve changes to the lithium chemistry of batteries, their mechanical properties and the electronics that control them.
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