质量守恒定律 自然界的基本定律之一 law of conservation of mass 质量守恒定律一般指物质守恒定律(自然界的基本定律之一) Law of conservation of mass generally refers to the law of conservation of matter (one of the fundamental laws of nature) 拉瓦锡, 现代化学之父 Lavoisier ...
定性和定量 quality and quantity quality and quantity 英 区别: quantity 的 发音 中有明显的 n (number) 。 例: Certification of quality and quantity issued by the manufacturer is required. 由厂商出具的质量和数量保证书 . qua ...