Curlの独立ハイフン(-)とはどういう意味ですか?

Curlの独立ハイフン(-)とはどういう意味ですか?

このコマンドでは、独立したハイフン(-C&間)とはどういう-O意味ですか?

curl -C - -O http://www.intersil.com/content/dam/Intersil/documents/fn67/fn6742.pdf

FWIW - チュートリアルに従っています。ここ

答え1

-C -入力ファイルと出力ファイルに基づいて転送を再開する方法を自動的に決定します。

~からman curl(2番目の段落を参照):

   -C/--continue-at <offset>
          Continue/Resume a previous file transfer at the  given  offset.
          The  given  offset  is  the  exact number of bytes that will be
          skipped, counting from the beginning of the source file  before
          it  is  transferred  to the destination.  If used with uploads,
          the FTP server command SIZE will not be used by curl.

          Use "-C -" to tell curl to automatically find out where/how  to
          resume  the transfer. It then uses the given output/input files
          to figure that out.

          If this option is used several times,  the  last  one  will  be
          used.

答え2

次から始めて、最後の場所でのみダウンロードを再開します。男の巻き:

   -C/--continue-at <offset>
          Continue/Resume a previous file transfer at  the  given  offset.
          The  given  offset  is  the  exact  number of bytes that will be
          skipped, counting from the beginning of the source  file  before
          it is transferred to the destination.  If used with uploads, the
          FTP server command SIZE will not be used by curl.

          Use "-C -" to tell curl to automatically find out  where/how  to
          resume  the  transfer. It then uses the given output/input files
          to figure that out.

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