adj. 經(jīng)濟(jì)的;經(jīng)濟(jì)學(xué)的;合算的;有經(jīng)濟(jì)效益的;
eco 經(jīng)濟(jì) + nom學(xué)術(shù)領(lǐng)域 + ic ...的 → a.經(jīng)濟(jì)的,經(jīng)濟(jì)學(xué)的
n. 循環(huán),周期;自行車;時(shí)代,一段時(shí)間;整套;
vi. 周而復(fù)始,循環(huán);騎自行車;輪轉(zhuǎn);
vt. 運(yùn)轉(zhuǎn),循環(huán);使輪轉(zhuǎn);
cycl =ring,circle,表示”圓,環(huán)”