We ought not to look back unless it is to derive useful lessons from past errors, and for the purpose of profiting by dear-brought experience.
?? 名句詞匯解析
從本句名言中提取的重要詞匯，幫助你深度理解這句話
vt.& vi. 得到，導出;源于，來自;（從…中）提取;
?? de離開+riv河流+e →派生，得出
"Females and cubs clearly derive some benefit from living in groups."
雌獸與幼崽顯然受益于群居.
近義：infer, deduce, deduct, draw, educe, excogitate
反義：originate, procure, produce, provoke, rouse, cause
adj. 有用的，有益的，有幫助的;令人滿意的;
?? use用+ful可…的” →有用的
"The memory expansion cards are useful adjuncts to the computer."
內存擴充卡是計算機很有用的附件。
近義：helpful, assistive, available, profitable, purposive, serviceable
反義：idle, inane, ineffective, insignificant, lousy, needless
n. 意志;目的;作用;（進行中的）行動;
vt. 有意;打算;企圖（做）;決意（做）;
?? pur始終+pose放→始終放的東西→目的，意圖
"We spoke to little purpose — his mind was clearly made up already."
我們說的話幾乎不起作用,他顯然已下定決心了.
近義：intend, consider, appoint, ascribe, denote, designate
n. 經驗，體驗;經歷，閱歷;
vt. 親身參與，親身經歷;感受;發現;
?? ex出+per嘗試+ience名詞后綴→嘗試出來的東西→經驗
"Salary will be commensurate with experience."
薪金將會與資歷相稱。
近義：career, tradition, undergo, savvy, skill, expertise
反義：inexpertness, rawness, unskillfulness, callowness
vt.& vi. 看，瞧;
vi. 注意;面向;尋找;看起來好像;
n. 看;（尤指吸引人的）相貌;眼神;樣子;
int. （插話或喚起注意）喂，聽我說;
?? l(棍)+oo(雙眼)+k(開):掙開雙眼搜索棍- 看
"That uniform makes the guards look absurd."
警衛們穿著那種制服看起來怪模怪樣的。
近義：appear, seem, see, appearance, image, area
n. 背，背部;背面，反面;后面，后部;（椅子等的）靠背;
vt. 使后退;支持;加背書于;下賭注于;
vi. 后退;倒退;
adj. 背部的;后面的;以前的;拖欠的;
adv. 以前;向后地;
"Water allotments to farmers were cut back in the drought."
在干旱時期配給農民的水量減少。
近義：second, support, endorse, illustrate, document, backtrack
反義：impel, inch, save, loop, sheer, slew