quadrillion

number

1. 千的五次幂
   the number 10¹⁵, or 1 followed by 15 zeros

1. Dow Chemical says its green investments have saved 1.8 quadrillion British thermal units of energy since 1994& enough to power every home in California for 20 months.
   陶氏化学表示，绿色投资1994年以来已为其节约能源达1.8千万亿英热单位&足以为美国加州所有家庭供电20个月。
2. The spectrometer can measure chromium, iron, copper and other elements to several parts per quadrillion.
   质谱仪对铬、铁、铜等元素的检测精度可以达到千万亿分之一的数量级。
3. The technique is so sensitive that it can detect a single radioactive carbon atom hiding among a quadrillion ( one million billion) ordinary ones.
   这项技术非常敏感，甚至能够在十的十五次方（一千万亿）个普通碳原子中找到一个放射性碳原子。
4. The odds of this has been calculated at one in eighteen septillion and luck like this could only come once every quadrillion years.
   这概率相当于是一比一千的八次方，也就是说一万亿年才有一次的机会。

noun

1. the number that is represented as a one followed by 15 zeros

2. the number that is represented as a one followed by 24 zeros
   1. in England they call a septillion a quadrillion