1. 名詞
   第十七
   月的第十七日
   one seventeenth/
   a seventeenth:
   十七分之一
   one seventeenth of ...(數字)/
   a seventeenth of ...(數字):
   ...的十七分之一
   /此名詞複數為"seventeenths"/
   

2. 形容詞
   第十七的, 第十七個的
   十七分之一的
   

例句

1. This has been obvious since the seventeenth century.
2. The telescope was introduced in the seventeenth century.
3. Trade with Europeans was lively in the seventeenth century.
4. Such trade was difficult enough in the seventeenth century.
5. But some critics say the Seventeenth Amendment was a mistake .
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