“ppb”的概念、定义、翻译、参考文献-科学参考

科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。

单词	ppb
释义	ppb Geology and Earth Sciences Parts per billion (10⁹).
随便看	Wilkes, John (1727–97) Wilkes, Maurice Vincent Wilke–Chang correlation Wilkins, John Wilkins, Maurice Hugh Frederick Wilkinson, James (1757–1825) Wilkinson Microwave Anisotropy Probe Wilkinson, Sir Geoffrey Wilkins, Roy (1901–81) Wilk, Martin Bradbury (1922–2013) Wilks, Samuel Stanley (1906–64) Wilks's lambda will Willard, Emma (1787–1870) willemite William Herschel Telescope William I (1797–1888) William II (1056–1100) William II (1859–1941) William III (of Orange) (1650–1702) William I (the Conqueror) (1028–87) William I (the Lion) (1143–1214) William I (the Silent) (1533–84) William IV (1765–1837) William of Auvergne (c.1180–1249)