mass number

常見例句

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(cè)量時(shí)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(tuán)。
The mass rally was a total fiasco.
那次群眾集會(huì)徹底失敗。
He thumbed through the directory to look for her number.
他翻閱電話號(hào)碼簿找尋她的號(hào)碼。
Let me note down your address and telephone number.
讓我記下你的地址和電話號(hào)碼。