chemical composition

基本解釋

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.
我們知道它們在往玻璃管上抹一種液體，但我們不知道它們是從哪里分泌出來的，也不知道它的化學成分。
It measured temperature, pressure, chemical composition, cloud characteristics, sunlight and energy internal to the planet, and lightning.
它測量溫度，壓力，化學成分，云的特點，陽光和行星內(nèi)部的能量，以及閃電。
Some researchers think they have the answer, and it comes down to the structure of the food, not its chemical composition-a finding that could help rid some processed foods of chemical preservatives.
已有些研究者認為他們找到了答案,這與食物的結(jié)構(gòu)有關(guān),而不是它的化學成分—這一發(fā)現(xiàn)使得有些化學處理保存食物的方法無效了。

Now, the differences here may be subtle in terms of chemical composition or if you put these cells under a microscope and looked at their analysis.
干細胞與祖細胞化學成分的區(qū)別,還非常微小,除非你把細胞放在顯微鏡下,或者看細胞分析報告
耶魯公開課 - 生物醫(yī)學工程探索課程節(jié)選
In the time it takes for one cell division to occur, it could be that this cell entraps a different chemical composition of the cytoplasm then this entraps, and that's a well known concept.
當一個細胞分裂發(fā)生期間,很可能這個細胞截留了一種不同的,細胞質(zhì)化學組分,這種非對稱分裂是一個廣為人知的概念
耶魯公開課 - 生物醫(yī)學工程探索課程節(jié)選
We need to have conditions internally that are relatively constant in terms of temperature, and pH, and chemical composition in order for us to thrive.
我們需要體內(nèi)的環(huán)境參數(shù)保持相對穩(wěn)定,這些環(huán)境參數(shù)包括,溫度,pH值,以及化學組成,這樣人才能茁壯成長
耶魯公開課 - 生物醫(yī)學工程探索課程節(jié)選

Rover scientists waited for data from rover instruments that measure the chemical composition of rocks.
NPR: Mars Rover Marks Second Anniversary of Landing

化學組分
The lignin is ,the main chemical composition of plants, the organic compound which quantity is only inferior to the cellulose on the Earth, the evolution product of the plant organization. Lignin plays a vital role in plant's normal growth.
木質(zhì)素是植物體的主要化學組分,是地球上數(shù)量僅次于纖維素的有機物,是植物組織進化的產(chǎn)物,對植物的正常生長具有重要作用。
化學組成

結(jié)構(gòu)
The effect of process parameters on the chemical composition and structure of titanium oxide films were studied.
研究了工藝參數(shù)對氧化鈦薄膜的結(jié)構(gòu)及成分的影響。
能源科學技術(shù)
成份