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This tag is for questions related to the meanings of phrases, particularly their definitions and nuances.

1 vote
1 answer
722 views

What is the meaning of "reflection about"?

A book on algebra by Sullivian contains a sentence like this: Symmetry with respect to the origin may be viewed as a reflection about the y-axis, followed by a reflection about the x-axis. Her …
Noman's user avatar
  • 269
-1 votes
2 answers
2k views

What does the phrase "Critical edge" means? [closed]

But, amazingly,this practice provided the British with a critical edge in the Atlantic naval battle during 1941. In this sentence what does "critical edge" means? Then what will be the interpret …
Noman's user avatar
  • 269
2 votes
1 answer
20k views

What does the phrase "threading the needle" mean? [closed]

I saw this phrase in the book MySQL: The Complete Reference as the title of a paragraph. Though my reading is related to something like system design of MySQL server that also includes the word threa …
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