慢速英语:8 US States to Test High School Changes

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例句：People have no letters at the primary stage of civilization.
      在文明的初期, 人类是没有文字的。

2.precisely adv.精确地;恰好;细心地

例句：That answers precisely to our needs.
      那正好适合我们的需要。

（加强同意的语气）对，的确如此，一点也不错

例句：So you think we ought to wait here?—Precisely.
      那么你认为我们应该在这儿等吗?——对。

3.diploma n.毕业文凭, 学位证书, 执照

例句：She worked hard to earn her music diploma.
      她刻苦用功, 以求获得音乐学位证书。

4.upper adj.较高的, 上部的

例句：He is a member of the upper house of legislature.
      他是上议院的成员之一。

5.competitive adj.(价格等)有竞争力的

例句：Because of the high exchange rate, our products have lost their competitive edge.
      由于汇率很高, 我们的产品失去了竞争优势。

6.dominant adj.占优势的,统治的,支配的
 
例句：The British were formerly dominant in India.
      英国人从前统治印度。