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comprise
vt.①包含，包括 The Union comprises fifty states.美國有五十個州。②由……組成 The team is comprised of eleven members.一個隊由11名成員組成。③構成，組成 Fifty states comprise the Union.五十個州組成美國。
conceal
vt.~ sth./sb.(from sb./sth.) 隱藏He concealed his real motives from me.他對我隱瞞了他的真實動機。
真題例句：Their birth parents often try to conceal their birth information。
譯文：他們親生父母往往試圖隱瞞其出生的資料。
concede
vt.~ sth.(to sb.) 承認;承認失敗;允許(他人)得到 I concede that you are right.我承認你是對的。vi.讓步He had to concede.他只好讓步。
真題例句：Even exercise professionals concede half a point here.
譯文：甚至體能專業教練也會在這點上退讓半步。
concern
n.①關切的事，有關的事②關心，憂慮，焦慮public concern about/over/with corruption 公眾對于一個腐敗現象的憂慮parents’ loving concern for their children父母對孩子的關愛 ③對某人來說是感興趣的事物，關聯It’s no concern of mine.這事與我無關。④公司，企業a huge industrial concern 巨大的工業企業vt.①涉及，關于②使關心，使擔心
as/so far as…be concerned就……而言
真題例句：They concern a small number of people only.
譯文：他們只關注少數的人。
concerning
prep.關于 They show great anxiety concerning their retirement allowance.他們對自己的養老金問題顯得十分焦慮。
真題例句：Readers turn naturally to books because their curiosity concerning all manners of things, their eagerness to share in the experiences of others and their need to escape from their own limited environment.
譯文：讀者很自然地轉向書籍，因為他們對各種事物存有好奇心，他們渴望分享他人的經驗，他們需要擺脫自己有限的環境。
concession
n.讓步，特許，特許權，承認make some concession in price在價格上做些讓步;a concession to her inexperience體諒她缺乏經驗
concentrate
vi.&vt.①全神貫注，全力以赴 We must concentrate our efforts on improving education.我們必須致力于改進教育工作。②集中，聚集 concentrate on/upon 集中，中心Our population is concentrated in the big cities.我國人口集中在大城市里。③濃縮 n.濃縮物，濃縮液
真題例句：We should concentrate on sharply reducing interest rates to pull the economy out of recession.
譯文：我們應該集中精力大幅降低利率，以拉動經濟走出衰退。
辨析concentrate focus
這兩個動詞均有“集中，聚集”之意。都可以與介詞on搭配。
①concentrate 指把人或物集中在一起，也可指把精力或注意力集中于某一事物上。
②focus 側重指把光、熱、射線等集中于一點，也可指把思想或精力等集中于某人或某事情上。
constant
a.經常的，不斷的，連續發生的;永恒的
真題例句：Guidelines for preparing a resume are constantly changing.
譯文：簡歷寫作指南一直在不斷地更新。
adj. 全神貫注的，濃縮的 動詞concentrate
