2.race的意思:to compete against someone or something in a race,所以compete的意思要比race廣,math是不是打錯了,如果是match的話,if you are matched against someone else in a game or competition, you are competing against them 所以compete=be matched against
3.fear是動詞或名字,而affraid是形容詞,所以不用進行區分
如果要真正分清很多看似近義的詞之間的區別,只有壹個辦法,用原版的完全英英對照的詞典,這樣意思和用法上的區別就壹目了然了