main function
main goal
main gradients
main group
main group elements
main groups
main hypotheses
main ideas
main incentives
main indications
main indicators
main influence
main ingredients
main insights
main interest
main islands
main isoform
main issue
main issues
main item

main limitation
main limiting factor
main lineages
main lines
main magnetic field
main meals
main means
main mechanism
main mediators
main memory
main metabolites
main methods
main modes
main motivation
main nutrients
main objective
main obstacles
main olfactory bulb
main outcome variable
main pancreatic duct
main parameters

main part
main pathogens
main pathway
main patterns
main peaks
main period
main pest
main phases
main players
main points
main pollinators
main population
main portal vein
main precursor
main predictions
main predictor
main prey
main principles
main problems
main processes
main product

main products
main properties
main propositions
main protease
main protein
main pulmonary artery
main purpose
main questions
main ranges
main reason
main regulator
main reservoir
main results
main risk factor
main river
main road
main role
main roots
main route
main sections
main segment

main sequence
main shock
main side-effect
main site
main source
main species
main stages
main stem
main stem bronchi
main steps
main strategies
main stream
main study