sec
名词 sec:
1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites
ratio of the hypotenuse to the adjacent side of a right-angled triangle
同义词:secant
an independent federal agency that oversees the exchange of securities to protect investors
同义词:Securities and Exchange Commission
形容词 sec:
(of champagne) moderately dry
同义词:unsweet