※ 引述《dawn2005 (拂曉時分)》之銘言:
: An indexing structure used by many IR
: systems is the inverted file.
: 請問 前面部份是子句簡化來的嗎
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i don't know how to explain this kind of grammartical rules,
but I think, yes, you are right,
"an indexing structure used by many IR"
means "an indexing structure is used by many IR"
and "is " is omitted.
so...
"used" is used to describe "a indexing structure"
(i don't want to type in english...but I can't type in chinese...why!?)