1/60 of a minute; the basic unit of time adopted under the Systeme International d''Unites 同义词:second, sec,
百科解释
S (named ess , spelled 'es'- in compound words; plural esses"S", Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "ess," op. cit.