核心问题
two-thirds 和 two-thirds 哪种拼写法正确？
词典解答
当分数用作修饰语时,总要用连字符:
We were short of a two-thirds majority. (Perrin) 我们不够三分之二的多数。
但是,当分数用作名词时,则有两种拼写法并存:
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Two thirds of the land was uncultivated. (CGEL) 三分之二的土地未耕种。
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Two thirds of apples were bad. (Wood) 三分之二的苹果都坏了。
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Two-thirds of the work is finished. (TOEFL) 工作完成了三分之二。
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Approximately three-fourths of the earth's surface is covered with water. (TOEFL) 地球表面大约四分之三被水覆盖着。