mass number
英漢例句
- Chemical element is the general term for the same type of atoms with the same mass number.
化學(xué)元素是具有相同核電荷數(shù)的同一類原子的總稱。 - Any of two or more nuclei with the same mass number and atomic number that have different radioactive properties and can exist in any of several energy states for a measurable period of time.
同質(zhì)異能素兩種或更多種具有相同的質(zhì)子數(shù)和原子數(shù)，但有不同的輻射特性并能在幾種能量狀態(tài)中的任一種里存在一段可測量時間的原子核中 - A cloud is a mass of vapor in the sky.
云是天空中的水汽團。 - The mass rally was a total fiasco.
那次群眾集會徹底失敗。 - He thumbed through the directory to look for her number.
他翻閱電話號碼簿找尋她的號碼。