noun 下载 🔗分享 公斤，千克 In the International System of Units, the base unit of mass; conceived of as the mass of one litre of water, but now defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10-34 when expressed in units of kg⋅m2⋅s−1. Symbol: kg Examples : "The scientist measured the mass of the rock sample in kilograms, finding it to be 2.5 kilograms. " 这位科学家用公斤来测量这块岩石样本的质量，发现是2.5公斤。 mass unit physics science 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 公斤, 千克 The unit of weight such that a one-kilogram mass is also a one-kilogram weight. Examples : "The bag of flour weighs one kilogramme. " 这袋面粉重一公斤。 mass physics science unit amount 与AI对话词汇游戏阅读练习
