Pǔ lǎng kè cháng shù
Planck's constant h, approximately equal to 6.626 x 10^-34 joule.seconds or 4.135 x 10^-15 electron volt.seconds
jī fēn cháng shù
constant of integration (math.)
Ā fú jiā dé luó cháng shù
Avogadro's number
the number of molecules in a mole, about 6.022 x 10^23