The operation, which lasted for over four hours, proved to be very difficult because of the hard resin which covered the skin.
手術(shù)持續(xù)了4個(gè)多小時(shí)，非常難做，因?yàn)槠つw上覆蓋著一層硬硬的樹(shù)脂。
新概念英語(yǔ)第二冊(cè) Lesson 77 A successful operation

?? 句中詞匯解析

從本句中提取的重要詞匯

operation [,ɑp?'re??n] 詞頻1 詞根: oper
n. 操作，經(jīng)營(yíng);手術(shù);[數(shù)]運(yùn)算;作用;
?? oper 工作 + ation 表示行為、狀態(tài)、過(guò)程 → n.操作；手術(shù)；運(yùn)算
"a triple bypass operation"
接三通管的手術(shù)
近義：campaign, enterprise, errand, maneuver, maneuvering, manoeuvering
difficult ['d?f?k?lt] 詞頻1 詞根: di
adj. 困難的;難做的;難解的;不易相處的;
?? dif不+fic做+ult表名詞→不好做→困難的
"The short story is a difficult art form to master."
短篇小說(shuō)是一種很難掌握的藝術(shù)形式。
近義：rough, troublesome, complicated, arduous, intricate, labored 反義：uncomplicated, basic, cushy, doss, easy, facile
because [b?'k?z] 詞頻1 詞根: be
conj. 因?yàn)?
?? cause, cuse 表原因,目的;司法程序,訴訟
"He was arrested because of his political affiliation."
他因所屬政黨的關(guān)系而被捕。
近義：since, whereas, for, forasmuchas
over ['ov?] 詞頻1
prep. （表示方向）越過(guò);（部份或全部覆蓋）在…上面;由于;（表示論及）關(guān)于; adv. 結(jié)束;再;（倒）下;從一邊至另一邊; adj. 過(guò)去的;外面的;在上的;上級(jí)的; n. 額外;剩余;剩余（或多余）的量;剩余物; int. [電信學(xué)]報(bào)文完，請(qǐng)回復(fù)！; vt. 走過(guò)，跳過(guò);[美國(guó)方言]從…恢復(fù)過(guò)來(lái);
"The government did an about-turn over nuclear energy."
政府對(duì)核能的態(tài)度來(lái)了個(gè)180度的大轉(zhuǎn)變。
近義：above, on, up, regarding, relating, respecting 反義：under, below, beneath
hard [hɑrd] 詞頻1
adj. 困難的;硬的;有力的;努力的; adv. 努力地;猛力地;嚴(yán)重地;沉重地; n. 英〉硬海灘，登陸處;
"She attributes her success to hard work and a little luck."
她認(rèn)為她的成功來(lái)自勤勞和一點(diǎn)運(yùn)氣。
近義：strongly, rigidly, stiffly, resistant, resistive, steely 反義：malleable, mellow, mild, attenuated, softened, squashy

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