n.
a person or thing that takes or can take the place of another
同义词：replacement
an athlete who plays only when a starter on the team is replaced
同义词：reservesecond-stringer
someone who takes the place of another (as when things get dangerous or difficult)
同义词：stand-inreliefrelieverbackupbackup manfill-in
Lanthanum-substituted bismuth titanate for use in non-volatile memories
Substituted Quinodimethans. II. Anion-radical Derivatives and Complexes of 7,7,8,8-Tetracyanoquinodimethan
Substituted diazenes: effect on the growth of enterobacteria and possible use as selective agents for isolation of pseudomonads
Synthesis and evaluation of 11C-labeled 6-substituted 2-arylbenzothiazoles as amyloid imaging agents
Sequenceselective recognition of DNA by displacement with a thyminesubstituted polyamide
Structural and physical properties of the metal ( M ) substituted YBa 2 Cu 3 - x M x O 7 - y perovskite
N-ω,(ω-1)-dialkyloxy)- and N-(ω,(ω-1)-dialkenyloxy)Alk-1-YL-N,N,N-tetrasubstituted ammonium lipids and uses therefor
Cytochemical demonstration of succinic dehydrogenase by the use of a new p-nitrophenyl substituted ditetrazole.
Vibrational Spectra and Bonding in Metal Carbonyls. I. Infrared Spectra of Phosphine-substituted Group VI Carbonyls in the CO Stretc...
Synthesis of novel GABA uptake inhibitors. part 6: Preparation and evaluation of -Ω asymmetrically substituted nipecotic acid deriv...
