保長對應 bǎo cháng duì yìng

DEFINITIONS

  1. (math.) distance-preserving correspondence
  2. isometry

CHARACTERS

保 bǎo
HSK 4
protect, safeguard, defend, care
長 cháng long; length; excel in; leader
對 duì correct, right; facing, opposed
應 yìng should, ought to, must