十億分比（parts per billion，ppb），定義為十億分之一。1ppb 即是十億分之一。 1 p p b = 1 10 9 {\displaystyle 1ppb={\frac {1}{10^{9}}}} 一【公斤】（kg）的物質中有一【微克】（ug）某物質，某物質含量即為1ppb。

than $100 million per year for construction within the United States. This largely closes the loophole Trump tried to use to fund parts of his border wall

2013–2017 – 6.887 billion美元 1.167 billion美元 in 2013. 1.194 billion美元 in 2014. 1.5 billion美元 in 2015. 1.468 billion美元 in 2016. 1.558 billion美元 in 2017. 2018

Average Over $4 Billion Per Launch [...] We project the cost to fly a single SLS/Orion system through at least Artemis IV to be $4.1 billion per launch at a

YouTubers and TikTokers against each other in a series of mini-games in various parts of the stadium complex, including in YouTube Theater. After that, the second