noun 下载 🔗分享 微米 An SI/MKS unit of measure, the length of one millionth of a meter. Symbols: µm, um, rm. Examples : "The scientist used a micrometer to measure the tiny speck of dust. " 科学家用微米来测量那微小的尘埃颗粒。 unit science physics technical math amount 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 螺旋测微器，千分尺 A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter. Examples : "The mechanic used a micrometer to measure the precise thickness of the car's brake rotor. " 那位机械师用螺旋测微器/千分尺精确测量了汽车刹车盘的厚度。 device technology machine science technical physics 与AI对话词汇游戏阅读练习
