coefficient [,ko?'f??nt]

n. 系數;（測定某種質量或變化過程的）率;程度;協同因素; adj. 共同作用的;合作的;

co共同+ef出+fici做+ent...的 → co共同+efficient做出來=有效的 → 一起有效的 → 系數

of [?v]

prep. 關于;屬于…的;由…制成; aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];

efficiency [?'f???nsi]

n. 效率，效能;實力，能力;[物]性能;功效;

ef出+fic做+iency表名詞 →做出事情→ 有效率

But, like your Grandpa suggested,

但是， 照你爺爺所建議的，

An ass endures his burden,but not more than his burden.

驢子能負重，過重也難負。

My dear friend, Mathilde. Let me tell you something. That necklace you borrowed from me wasn't a real diamond necklace. It wasn't valuable at all. The stones in the necklace were made of glass. It was worth five hundred francs at the most.

瑪蒂爾德，我親愛的朋友。讓我告訴你吧。你向我借的那條項鏈并不是一條真的鉆石項鏈。那條項鏈根本不值錢。項鏈中的寶石是玻璃做的。它最多值500法郎。