a(an)¹²★

教科书上讲的是正确的,但是有些作者把 h 音读得非常微弱,甚至于不把[h]音读出来,结果就读成或写成 an historic event。这种现象决不是绝无仅有的,因而已引起了语言学家们的重视,并得到认可:

1. an historical novel, an hotel, an herb, an habitual drunkard (CGEL, § 5.11)

2. Two entertaining talks by John Pemble, an historian, on Radio 3 ‘reflected’ ... on the tuberculous British abroad in the nineteenth century. 在无线电广播三台上，历史学家约翰·彭布尔所作的两个有趣的讲话“回顾”了……在19世纪时国外的患结核病的英国人的问题。

3. Harrison agreed to publish the book and was then let into the secret—which she, like Gottlieb, has kept for an heroic $2\$frac{1}{2} years. 哈里森同意出版该书，接着就知道这个秘密——对这项秘密，她像戈特利布一样，保守了足足两年半之久，这的确够令人钦佩的。（转引自《英语准确用词词典》）