1 INTRODUCTION
2 GALAXY SAMPLES AND PROPERTIES
2.1 Local Cluster Survey
2.2 Field Sample
2.3 Galaxy Properties
2.4 The Final Samples
3 RESULTS
3.1 SFR-Stellar Mass Relation of Star-Forming Galaxies in Different Environments
3.2 B/T Distribution of Suppressed Galaxies
3.3 Restricting to Disk-Dominated Galaxies
4 QUANTIFYING THE TIMESCALE OF SFR DECLINE
4.1 Modeling Cluster Infall
5 DISCUSSION
5.1 Mechanisms Driving Quenching
5.2 Timescale Associated with Environmentally-Driven Quenching
5.3 Estimating the Contamination from Passive Galaxies
6 SUMMARY AND CONCLUSIONS