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parsec    音标拼音: [p'ɑrs,ɛk]
n. 表示天体间距离的单位

表示天体间距离的单位

parsec
n 1: a unit of astronomical length based on the distance from
Earth at which stellar parallax is 1 second of arc;
equivalent to 3.262 light years [synonym: {parsec}, {secpar}]

parsec \par"sec\ (p[aum]r"s[e^]k), n. [From parallax second. See
{parallax second} and {annual parallax}, under {parallax}.]
(Astron.)
A unit of length used in describing astronomical distances,
equal to 3.26 light years, or 3.086 x 1013 km. Abbreviated
pc. The derived units of kiloparsec (kpc, 1000 parsecs) and
megaparsec (mpc, one million parsecs) are often found in
discussion of astronomical distances.
[PJC]


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  • Newest parsec Questions - Stack Overflow
    Stack Overflow | The World’s Largest Online Community for Developers
  • Simply using parsec in python - Stack Overflow
    For the sake of convenience, we first define the characters we wish to match parsec provides many types: letter(): matches any alphabetic character, string(str): matches any specified string str, space(): matches any whitespace character, spaces(): matches multiple whitespace characters, digit(): matches any digit, eof(): matches EOF flag of a
  • Parsec: difference between try and lookAhead?
    The combinators try and lookAhead are similar in that they both let Parsec "rewind", but they apply in different circumstances In particular, try rewinds failure while lookAhead rewinds success
  • Parsec vs Yacc Bison Antlr: Why and when to use Parsec?
    44 I'm new to Haskell and Parsec After reading Chapter 16 Using Parsec of Real World Haskell, a question appeared in my mind: Why and when is Parsec better than other parser generators like Yacc Bison Antlr? My understanding is that Parsec creates a nice DSL of writing parsers and Haskell makes it very easy and expressive
  • Parsec Connection Failure Error -10 and -11 - Stack Overflow
    There might be several reasons for these two errors, however the Parsec docs does not give possible solutions In my case going to App Features > Optional Features > Add Feature and then look for Media Feature Pack and install it, reboot and should work I was able to discover this issue due to Rainway and Dixter failing because a dll was missing regarding this precise feature
  • Should I use a lexer when using a parser combinator library like Parsec?
    When writing a parser in a parser combinator library like Haskell's Parsec, you usually have 2 choices: Write a lexer to split your String input into tokens, then perform parsing on [Token]
  • haskell - Whats the difference between Text. ParserCombinators. Parsec . . .
    Parsec 3 can work with arbitrary streams -- data structures with a list-like interface You can define your own streams, but Parsec 3 also includes a popular and efficient Stream implementation based on ByteString (for Char -based parsing), exposed through the modules Text Parsec ByteString and Text Parsec ByteString Lazy
  • Using Parsec to parse regular expressions - Stack Overflow
    Using Parsec to parse regular expressions Asked 13 years, 4 months ago Modified 13 years, 1 month ago Viewed 3k times
  • Building Parsec dedup workload with parsecmgmt fails
    I am trying to build Parsec_3 0 dedup workload on skylake server with gcc (Debian 6 3 0-18+deb9u1) 6 3 0 I managed to build streamcluster and canneal successfully without issues, however with ded





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