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水的化学分子式是H0?。The chemical formula for water is H0?.

水的化学分子式是h2o。The chemical formula for water is H2O.

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前一个分子式的形式得到正式的表述。The form of the former formula is formally formulated.

前一个分子式的形式得到正式表述。The form of the former formula is formally formulated.

前一个分子式的情势得到正式表述。The form. of the former formula is formally formulated.

在这一组的分子式中，每一个字母都代表一个不同的基因。where each different letter stands for a different gene.

我们上学时学过化学分子式，但我只记得水是H2O。We learned chemical formulas at school but I can only remember H2O for water.

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氢气的分子式为H2，它是一种无色、无溴和无味的气体。Hydrogen is referred to as H2. It is a colourless, odourless and tasteless gas.

分子式只不过表示碳和氢原子各自的总和。The molecular formula shows nothing but the total member of carbon and hydrogen atoms.

乳糖一种双糖，分子式为，它存在于牛奶中CHO，在水中水解时产生葡萄糖或蔗糖。A disaccharide, CHO, found in milk, that may be hydrolyzed to yield glucose and galactose.

所以，上面所展示的一个组别的分子式不过就是全部的DNA分子的一小部分。The unit shown above, therefore, is no more than a small portion of the whole DNA molecule.

仅从分子式，我们就能推断分子中的“不饱和度”。From the molecular formula alone, we can deduce the "degrees of unsaturation " in the molecule.

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最后确定样品可能是飞燕草色素-3-葡糖苷，分子式为C21H21O12。At last confirming the pigment was delphinidin-3-O-glucoside, the molecular formula is C21H21O12.

这些突变给制药公司提供了许多分子式或者说是药物要攻克的“目标”。That is providing drug companies with dozens of molecules, or “targets, ” that drugs could block.

在确定一个化合物的结构式之前，首先应知道它的分子式。Before we can assign a structural formula to a compound, we must first know its molecular formula.

羟基是分子式是HO，水分子式是H2O，羟基通常是水分子分解后的产物。Hydroxyl is HO, as opposed to water’s H2O, and it is usually the result of water molecules decomposing.

现在，因为分子式完全独立的，所以这个应该等于独立概率的乘积。Now, since the molecules are completely independent, this should just be the product of the separate probabilities.

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实际计算中是把组成该物质分子式的各原子的原子量求和而得。It is calculated in practice by summing the atomic weights of the atoms making up the substance's molecular formula.

辛烷一种具有这种分子式的同分异构的石蜡氢碳化合物，此式为c8h18，在石油中发现，用作燃料和溶剂。Any of various isomeric paraffin hydrocarbons with the formula C8H18, found in petroleum and used as a fuel and solvent.

提出一个只由正常沸点和分子式估算烃类物质蒸气压的方法。A method of predicting vapor pressures of hydrocarbons from the normal boiling points and the molecular formulas is proposed.