After his attempt, Campbell was disappointed to learn that his average speed had been 299 miles per hour.
比賽結束后，坎貝爾非常失望地得知他的平均時速是299英里。
新概念英語第二冊 Lesson 72 A car called bluebird

?? 句中詞匯解析

從本句中提取的重要詞匯

attempt [?'t?mpt] 詞頻1 詞根: tempt
vt. 試圖;嘗試; n. 進攻;嘗試，沖擊;
?? at一再+tempt嘗試→一再嘗試 → 嘗試，企圖
"The move was widely seen as an attempt to appease critics of the regime."
普遍認為，這一舉措是試圖安撫批評政權的人。
近義：try, essay, intent, assay, shy, stab
disappointed [[?dis?'p?intid]] 詞根: 刺扎
a. 失望的
近義：manque, wistful, choked, unfulfilled, disabused, disenchanted
learn [l?n] 詞頻1
vt.& vi. 學習，學會;習得;得知;記住; vt. 記住;學習;得知;認識到; vi. 學習;獲知;
?? 學習好才能掙錢(earn)
"Children must learn socially acceptable behaviour."
兒童必須學會社會上認可的行為舉止。
近義：know, acquire, develop, find, realize 反義：forget
average ['?v?r?d?] 詞頻1
adj. 平常的;平均的;典型的;（價值、比率等的）平均數的; n. 平均水平;（速度等的）平均率;平均估價; vt. [數學] 計算…的平均值;調和，拉平;分攤;按比例（或平均）分配（利潤等）; vi. 平均：作為或達到一個中間值;維持（有利的）平均價格;
?? aver(every每個)+age(后綴):- 平均的
"a rise in average earnings"
平均收入的增加
近義：curve, mean, median, medium, middle, midpoint 反義：appreciable, memorable, notable, noted, noticeable, notorious
speed [spid] 詞頻1 詞根: sp-
n. 速度;快速;昌盛;（汽車的）變速器，排擋; vt.& vi. 急行，加速; vi. 超速;加速;迅速前行;興隆; vt. 加快…的速度;使成功，使繁榮;
"Watch out for sharp bends and adjust your speed accordingly."
當心急轉彎并相應調整車速。
近義：accelerate, budge, advance, hasten, pelt, race 反義：slow, brake, heaviness, impassivity, lateness, listlessness

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