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- Waterproof and breathable polymer film and coatings are permeable to water vapour molecules and not to permit water droplets to penetrate through them. 防水可呼吸性是指聚合物薄膜及涂层不允许水滴透过,同时却要保证水蒸汽分子自由透过,达到防水可呼吸的目的。
- A cloud is a condensation of water vapour. 云是由水蒸汽凝缩而成的。
- A cloud is a mass of vapour in the sky. 云是天空中的水汽团。
- Water can be changed into vapour when heated. 水被加热时,可以变成水蒸汽。
- A molecule that can combine with others to form a polymer. 单体可以与其他分子结合形成聚合物的分子
- It can change water into vapour. 它能把水变成蒸汽。
- An oxide containing three oxygen atoms per molecule. 三氧化物每个分子中含有三个氧原子的氧化物
- The hot vapour spouted from a rusted pipe. 热蒸汽从一个生了锈的管子里喷了出来。
- Then a brown vapour is given off. 这时会放出一种棕色的气体。
- A molecule of water consists of two atoms of hydrogen and one atom of oxygen. 水分子含有两个氢原子和一个氧原子。
- He sniffed the vapour up (through his nose). 他(用鼻子)吸入蒸气.
- Closest to the functional group of atoms in an organic molecule. 阿尔法位的,第一位的在有机分子中离功能原子基团最近的
- Petrol forms vapour above a certain temperature. 高于一定的温度汽油就形成蒸气。
- When heated,water change into vapour. 给水加热时,它会变成蒸气。
- Heated, the water turns to vapour. 加热时,水会变成蒸汽。
- A film or layer of a compound one molecule thick. 单分子层一分子厚度化合物的膜或层
- Containing three atoms per molecule. 三原子的三代的每个分子中包含有三个原子的
- Glucose has a simple sugar molecule. 葡萄糖含有单糖分子。
- Each sugar molecule has the properties of sugar. 每个糖分子都具有糖的性质。
- When heated, water changes into vapour. 给水加热时,它会变成蒸气。