1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)
the cardinal compass point that is at 180 degrees
a unit of conductance equal to the reciprocal of an ohm
the 19th letter of the Roman alphabet
(thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work;
"entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity"
沪公网安备 31011502000490号
电信业务许可证编号：沪B2-20190700
