沪江

【TOEFL核心词汇】No.9 车床

2012-12-02 08:00
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Hints: 只听写例句。前面的单词不用听写。注意有两个"——"符号。
In the late sixteenth century the glass lathe was introduced, making it possible to ground several lenses at once and also to produce——as objects of curiosity——powerful, thick concave lenses.
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