俗话说“条条大路通罗马”，背诵
生物学
parasite
parasitic
mimicry
symbiosis
symbiotic
creature
organism
strain
species
vital
ripe
evolve
evolutionary
Darwinism
extinct
extinction
breed
reproduction
proliferate
propagate
subsist
exist
posterity
fermentation
respiration
stodgy
secrete
secretion
assimilate
immune
immunity
metabolism
morphology
microscope
calorie
carbohydrate
glucose
protein
organ