選択的
analyzing
beaker
biochemist
biology
biotechnology
blue
boiling
bottle
bunsen
burner
chemical
chemist
chemistry
class
clinic
closeup
cylinder
discovery
equipment
experiment
flask
focus
glass
green
hand
healthcare
industry
laboratory
lighting
liquid
medical
medicine
microbiology
multi
nobody
person
reactants
research
school
science
scientific
scientist
stirring
technician
technology
test
tube
water
worker