noun🔗Share微米 An SI/MKS unit of measure, the length of one millionth of a meter. Symbols: µm, um, rm."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。unitsciencephysicstechnicalmathamountChat with AIVocabulary GamePractice Reading
noun🔗Share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."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。devicetechnologymachinesciencetechnicalphysicsChat with AIVocabulary GamePractice Reading
