例句：Air is a fluid but not a liquid, while water is both afluid and a liquid.
空氣是流體不是液體，水是流體也是液體。
fluctuate v.變動(dòng).波動(dòng)，漲落
例句：The price of vegetables fluctuates according to the weather.
蔬菜價(jià)格隨著天氣變化而波動(dòng)。
fluent adj. 流利的，流暢的
例句：Daisy likes him all the better for his fluent spoken English.
正因?yàn)樗僖豢诹骼挠⒄Z(yǔ)，戴茜更愛(ài)他。
flush n.臉紅，激動(dòng)
例句：Ellen shows a flush ofjoy at his coming.
對(duì)他的到來(lái)愛(ài)倫高興地臉紅了。
influence n.影響，感化 v.影響，改變
例句：Her parents no longer have any real influence over her.
她的父母對(duì)她不再有任何真正的約束力了。
influential adj. 有影響的，有勢(shì)力的
例句：Those facts were influential in solving the problem.
邢些事實(shí)對(duì)解決問(wèn)題有重大的影響。
impact n.碰撞，影響，效果
例句：The plane flew into a mountain and disintegrated on impact.
飛機(jī)沖向一座山，撞得粉碎。
compact adj. 緊奠的，緊密的 n.契約，合同
例句：The Commonwealth agreed to make a compact with this country.
英聯(lián)邦同意和這個(gè)國(guó)家訂約。
