英语翻译a primary standard is a water soluble substance that is

1.water is a substance essential to our life.2.water that is 英语翻译1.A vaccine is a substance that is prepared from killed 英语翻译There is no standard for how much water a person needs e 英语翻译Salt is a principal wicked substance.Salt,sodium chlorid 英语翻译The number of standard deviations that a value (x) is ab 英语翻译A drug is a substance which is taken into the body.Some this is a standard是什么意思 英语翻译firstly,there is a normal charge standard at destination 英语翻译The Green Dragon Environmental Management Standard is a 英语翻译The solubility of a substance at a given temperature is 英语翻译A drug is,in the broadest of terms,a chemical substance 英语翻译This standard is a further development of standard STD 1